Wyniki wyszukiwania dla: COLORED NOISE

• Noise Generated by Tyres Designet for Electric Vehicles - Results of Laboratory Experiments

  Publikacja

  • J. Ejsmont
  • B. Świeczko-Żurek
  • S. Taryma
  • P. Mioduszewski

  - Rok 2015

  A few years ago, electric and hybrid vehicles were rarely seen on public roads and were considered more as exotic curiosities or even as a sign of extravagance than a practical means of transport. Nowadays the situation has changes significantly. This was caused both by the technical development and legislative actions, as well as the organizational nature promoting the purchace and use of low emission vehicles. Electric vehicles...

• INFLUENCE OF TEST CONDITIONS ON TYRE/ROAD NOISE MEASURED BY THE DRUM METHOD

  Publikacja

  • J. Ejsmont
  • S. Taryma
  • B. Świeczko-Żurek

  - Rok 2015

  Tyre/road noise is one of the most important environmental problems related to road traffic. Nowadays a few standard procedures of tyre/road noise measurements are in use. Unfortunately, measurement conditions specified within relevant standards are very different. For example, procedure described in ISO 11819-2 used for pavement investigations requires tyre load of 3200 N and capped inflation pressure of 200 kPa. At the same time...

• Investigation of noise threats and their impact on hearing in selected schools - a pilot study.

  Publikacja

  • J. Kotus
  • B. Kostek

  - Archives of Acoustics - Rok 2006

  Noise measurements conducted in selected schools in Gdansk area are presented in this paper. The main aim of this research was to determine noise threats at schools. Some objective measurements of the acoustic climate were performed employing a noise monitoring station engineered at the Multimedia System Department, Gdansk University of Technology. Simultaneously, subjective noise annoyance examinations were carried out among pupils...

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• Certification of vehicles used for tire/road noise evaluation by CPX method

  Publikacja

  • J. Ejsmont
  • P. Mioduszewski

  - NOISE CONTROL ENGINEERING JOURNAL - Rok 2009

  Jednym ze sposobów oceny hałasu opon i nawierzchni drogowych jest metda CPX polegająca na pomiarze hałasu w polu bliskim miejsca współpracy opony z nawierzchnią. Aby uzyskać wysoką dokładność pomiarów niezbędne jest ustanowienie procedur ustanowienie procedur certyfikacyjnych sprzętu pomiarowego a więc głównie pojazdu badawczego. Praca dotyczy procedur certyfikacyjnych wypracowanych przez Grupę Roboczą WG33 ISO/TC43/SC1 oraz w...

• High quality speech codec employing sines+noise+transients model

  Publikacja

  • M. Kulesza
  • Ł. Litwic
  • G. Szwoch
  • A. Czyżewski

  - Archives of Acoustics - Rok 2006

  A method of high quality wideband speech signal representation employing sines+transients+noise model is presented. The need for a wideband speech coding approach as well as various methods for analysis and synthesis of sines, residual and transient states of speech signal is discussed. The perceptual criterion is applied in the proposed approach during encoding of sines amplitudes in order to reduce bandwidth requirements and...

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• Tire/road noise measuring principles according to the Close Proximity Method

  Publikacja

  • P. Mioduszewski
  • J. Ejsmont

  - Tire Technology International - Rok 2007

  W pracy podano metody badania hałasu opon samochodowych. Omówiono przyczepy pomiarowe zbudowane w Politechnice Gdańskiej oraz systemy pomiarowe stosowane do pomiaru hałasu opon zgodnie z metodą CPX.

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• Quality assessments of electrochromic devices: the possibleuse of 1/f current noise

  Publikacja

  • J. Smulko
  • A. Azens
  • L. B. Kish
  • C. G. Granqvist

  - IONICS - Rok 2007

  Elementy wykorzystujące zjawisko elektrochromizmu, potrafiące zmieniać przezroczystość za pomocą ładowania/rozładowania ładunkiem elektrycznym, wykonano na bazie laminatów pokrytych porowatą strukturą tlenków Ni oraz tlenków Wi-V. Oba laminaty, na które naniesiono przewodzącą warstwę In2O3, przedzielono warstwą elektrolitu. Obserwowano szumy typu 1/f w prądzie I płynącym w trakcie rozładowywania urządzenia. Gęstość widmowa mocy...

• Assessment of Fuel Cells’ State of Health by Low-Frequency Noise Measurements

  Publikacja

  • A. Szewczyk
  • Ł. Gaweł
  • K. Darowicki
  • J. Smulko

  - ENERGIES - Rok 2021

  We proposed applying low-frequency (flicker) noise in proton-exchange membrane fuel cells under selected loads to assess their state of health. The measurement set-up comprised a precise data acquisition board and was able to record the DC voltage and its random component at the output. The set-up estimated the voltage noise power spectral density at frequencies up to a few hundred mHz. We observed the evolution of the electrical...

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• Reduction of Influence of the High-Frequency Noise on the Results of Surface Topography Measurements

  Publikacja

  • P. Podulka

  - Materials - Rok 2021

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• Rolling resistance and tyre/road noise on rubberised asphalt pavement in Poland

  Publikacja

  • B. Świeczko-Żurek
  • P. Jaskuła
  • J. Ejsmont
  • A. Kędzierska
  • P. Czajkowski

  - Road Materials and Pavement Design - Rok 2017

  The paper presents results of tyre/road noise and rolling resistance measurements performed on stone mastics asphalt (SMA) that contains rubberised asphalt, developed and produced by a refinery in Poland. Bituminous binder was modified with polymer and addition of crumb rubber. The first observations of asphalt mixture with the new kind of modified bitumen used on the field section are presented. Rolling resistance of passenger...

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• ROSANNE Project: New Procedure for Noise Characterisation of Road Surfaces in Europe

  Publikacja

  • M. Conter
  • R. Wehr
  • C. Aichinger
  • U. Sandberg
  • P. Mioduszewski
  • L. Goubert
  • P. Morgan
  • H. S. Rosmus
  • F. Ledee

  - Rok 2016

  ROSANNE is a collaborative project in the 7th EU Framework Programme which aims at harmonising measurement methods for skid resistance, noise emission and rolling resistance of road pavements as a preparation for standardization. The project started in November 2013 and is developing and improving standards in the field of working group CEN/TC 227/WG 5. Regarding the influence of the pavement on the road traffic noise emission,...

• Realistic noise-tolerant randomness amplification using finite number of devices

  Publikacja

  • F. Brandão
  • R. Ramanathan
  • A. Grudka
  • K. Horodecki
  • M. Horodecki
  • P. Horodecki
  • T. Szarek
  • H. Wojewódka

  - Nature Communications - Rok 2016

  Randomness is a fundamental concept, with implications from security of modern data systems, to fundamental laws of nature and even the philosophy of science. Randomness is called certified if it describes events that cannot be pre-determined by an external adversary. It is known that weak certified randomness can be amplified to nearly ideal randomness using quantum-mechanical systems. However, so far, it was unclear whether randomness amplification...

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• Signal conditioning for examination of shallow-water acoustic noise correlation properties

  Publikacja

  • M. Rudnicki
  • J. Marszal

  - HYDROACOUSTICS - Rok 2016

  The article describes the process of signal conditioning for examination of acoustic noise correlation properties in shallow water. Knowledge of these properties is very important for the design processes of passive and active hydroacoustic systems. This paper focuses on the above issue from the point of view of passive sonar. In sonar systems, signal processing algorithms operate on both useful acoustic signals, and accompanying...

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• On the Handling of Outliers in the GNSS Time Series by Means of the Noise and Probability Analysis

  Publikacja

  • A. Klos
  • J. Bogusz
  • M. Figurski
  • W. Kosek

  - Central European Journal of Geosciences - Rok 2015

  The data pre-analysis plays a significant role in the noise determination. The most important issue is to find an optimum criterion for outliers removal, since their existence can affect any further analysis. The noises in the GNSS time series are characterized by spectral index and amplitudes that can be determined with a few different methods. In this research, the Maximum Likelihood Estimation (MLE) was used. The noise amplitudes...

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• Reduction of road traffic noise by source measures — present and future strategies

  Publikacja

  • T. Berge
  • P. Mioduszewski
  • J. Ejsmont
  • B. Świeczko-Żurek

  - NOISE CONTROL ENGINEERING JOURNAL - Rok 2017

  The current trend worldwide is less focused on reducing road traffic noise. This is in strong contrast to the severe impact of traffic noise to the general health and quality of life. A more holistic and combined strategy is needed. Current international rules and regulations regarding vehicles and tyres are not sufficient to reduce traffic noise levels in an effective way. Calculations show that these regulations will only yield...

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• Tire/Road Noise On Poroelastic Road Surfaces - Results Of Laboratory Measurements

  Publikacja

  • J. Ejsmont
  • B. Świeczko-Żurek
  • W. Owczarzak
  • S. Sommer
  • G. Ronowski

  - Rok 2018

  Tire/road noise is the most important part of traffic noise for medium and high speed driving both in the case of passenger cars and trucks. The potential to make modification of tires that significantly reduce tire/road noise in nearly over, at least for conventional tires so the only promising action is to improve road pavements. One of the innovative solutions is poroelastic road pavement (PERS) that reduces airflow related...

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• Review and comparison of smoothing algorithms for one-dimensional data noise reduction

  Publikacja

  • P. Kowalski
  • R. Smyk

  - Rok 2018

  The paper considers the choice of parameters of smoothing algorithms for data denoising. The impact of the window size on smoothing accuracy was analyzed. The parameters of denoising filters were selected with respect to the meansquare error between the computed linear regression and the noisy signal. Finally, we have compared mean, median, SavitzkyGolay, Kalman and Gaussian filter algorithms for the data from the digital sensor....

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• Poroelastic Road Surface – a Promising Road Traffic Noise Abatement Solution

  Publikacja

  • P. Mioduszewski

  - Rok 2018

  Road surfaces have a direct impact on the generation of noise by rolling tyres, the main and dominant source of noise of moving vehicles, as well as may affect propagation of noise emitted by all noise sources of a vehicle. Thus there is no doubt that pavement should be considered as one of the major potential road traffic noise abatement measure. Low noise pavements of existing types may in new conditions provide up to 8 dB of...

• TIRE/ROAD NOISE AND TIRE ROLLING RESISTANCE ON PROTOTYPE PERS SURFACE

  Publikacja

  • S. Taryma
  • R. Woźniak
  • J. Ejsmont
  • P. Mioduszewski
  • G. Ronowski

  - IOP Conference Series: Materials Science and Engineering - Rok 2018

  Poroelastic road surfaces are characterized by low noise of tires running on them.Road pavements of this type are promising solution to problems related to traffic noise in cities and on rural roads. Some technical problems still have to be solved, in particular regarding durability and skid resistance on wet surface. Ongoing and planned works are to contribute to create a quiet, durable and safe road surface, which will become...

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• Implementation of constant component filter in measurements of random telegraph signal noise

  Publikacja

  • A. Szewczyk
  • S. Babicz-Kiewlicz
  • A. Dudziak

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2012

  Noise is generated in all semiconductor devices. The intensity of these fluctuations depends on used elements, manufacturing process, operating conditions and device type. The result noise is a superposition of different kinds of fluctuations like thermal noise, generation-recombination noise, 1/f noise, shot noise and Random Telegraph Signal (RTS) noise. The last one, RTS noise is observed as nonstationary impulse fluctuations....

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• Low frequency noise and DLTS as silicon solar cell characterization tools

  Publikacja

  • Z. Chobola
  • Z. Ruzicka
  • L. Hasse

  - Elektronika : konstrukcje, technologie, zastosowania - Rok 2002

  Praca zawiera wyniki pomiarów DLTS próbek o powierzchni 1 mm2 krzemowych baterii słonecznych wykazujących znaczne niejednorodności wykryte za pomocą metody LBIV (Light Beam Induced Voltage). Wyniki pomiarów charakterystyk stałoprądowych oraz szumowych tych próbek zostały także przedstawione.

• Modeling incipient creep damage effects on Barkhausen noise and magnetoacoustic emission.

  Publikacja

  • J. M. Sablik
  • B. Augustyniak
  • L. Piotrowski

  - Rok 2004

  Zaproponowano model fizyczny opisujący zmiany natężenia efektu Barkhausena i emisji magnetoakustycznej podczas procesu degradacji stali ekploatowanych w przemyśle energetycznym.

• Measurement of noise parameter set in the low frequency range: requirements and instrumentation.

  Publikacja

  • L. Hasse

  - Rok 2004

  Opisano dwa podstawowe szumowe modele metrologiczne czwórnika: ze źródłami szumów odniesionymi do wejścia i ze zwarciowymi prądami szumów. Parametry szumowe opisujące modele zawierające korelację pomiędzy prądami i/lub napięciami są mierzone przy zastosowaniu metod bezpośrednich i pośrednich. Przedstawiono kilka technik redukcji szumów własnych systemu pomiarowego. Szerzej zaprezentowano dwukanałowy system do pomiaru szumów z komputerowym...

• Noise reduction in audio employing spectral unpredictability measure and neural net.

  Publikacja

  • A. Czyżewski
  • M. Dziubiński

  - Rok 2004

  modelu psychoakustycznym zostały przedyskutowane. Uczący się algorytm decyzjny, działający w opraciu o sztuczną sieć neuronową wykorzystany został w klasyfikacji składowych na pasożytnicze i użyteczne. Przedstawiona została również nowa iteracyjna procedura obliczania progu maskowania. W pracy zawarte zostały wyniki eksperymentów, oraz konkluzje odnoszące się do przedstawionych algorytmów.

• Evaluation of reinforcement corrosion rate in concrete structures by electrochemical noise measurements

  Publikacja

  • J. Smulko
  • K. Darowicki
  • A. Zieliński

  - RUSSIAN JOURNAL OF ELECTROCHEMISTRY - Rok 2006

  W pracy przedstawiono wyniki obliczeń rezystancji polaryzacyjnej w układzie złożonym z dwóch elektrod (ze stali węglowej oraz elektrody odniesienia), umieszczonych w otulinie betonowej. Szybkość korozji ulega zmianom uzależnionym od stopnia nasiąknięcia betonu roztworem zawierającym jony chlorkowe. Zmiany rezystancji polaryzacyjnej elektrody stalowej oceniane są na podstawie pomiarów prądowego i potencjałowego szumu elektrochemicznego....

• Analysis of the Usefulness of Cheap Audio Recorders for Spectral Measurement of Environmental Noise

  Publikacja

  • J. Skibicki
  • R. Licow
  • N. Karkosińska-Brzozowska
  • K. Daliga
  • P. Chrostowski
  • A. Wilk
  • K. Karwowski
  • M. Szafrański
  • T. Widerski
  • L. Jarzębowicz... i 4 innych

  - Metrology - Rok 2023

  Environmental noise pollution is nowadays one of the most serious health threats. The impact of noise on the human body depends not only on the sound level but also on its spectral distribution. Reliable measurements of the environmental noise spectrum are often hampered by the very high price of top quality measuring devices. This paper explores the possibility of using much cheaper audio recorders for the frequency analysis....

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• Low noise poroelastic road pavements based on modified asphalt binder

  Publikacja

  • J. Ejsmont
  • B. Świeczko-Żurek
  • W. Gardziejczyk

  - Rok 2020

  Tire/road noise is one of the most important environmental problems related to road traffic. As the most effective way to fight noise is reduction of sound emission from the source, a lot of work is being done to improve tire and road surfaces construction. This paper describes the first “road” results obtained within the SEPOR project, which is focused on developing a low noise poroelastic road surface based on bituminous binder....

• Investigating Noise Interference on Speech Towards Applying the Lombard Effect Automatically

  Publikacja

  • G. Korvel
  • K. Kąkol
  • P. Treigys
  • B. Kostek

  - Rok 2022

  The aim of this study is two-fold. First, we perform a series of experiments to examine the interference of different noises on speech processing. For that purpose, we concentrate on the Lombard effect, an involuntary tendency to raise speech level in the presence of background noise. Then, we apply this knowledge to detecting speech with the Lombard effect. This is for preparing a dataset for training a machine learning-based...

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• A review of design approaches for the implementation of low-frequency noise measurement systems

  Publikacja

  • G. Scandurra
  • C. Ciofi
  • J. Smulko
  • H. Wen

  - REVIEW OF SCIENTIFIC INSTRUMENTS - Rok 2022

  Electronic noise has its roots in the fundamental physical interactions between matter and charged particles, carrying information about the phenomena that occur at the microscopic level. Therefore, Low-Frequency Noise Measurements (LFNM) are a well-established technique for the characterization of electron devices and materials and, compared to other techniques, they offer the advantage of being non-destructive and of providing...

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• Creating Dynamic Maps of Noise Threat Using PL-Grid Infrastructure

  Publikacja

  • M. Szczodrak
  • J. Kotus
  • B. Kostek
  • A. Czyżewski

  - Archives of Acoustics - Rok 2013

  The paper presents functionality and operation results of a system for creating dynamic maps of acoustic noise employing the PL-Grid infrastructure extended with a distributed sensor network. The work presented provides a demonstration of the services being prepared within the PLGrid Plus project for measuring, modeling and rendering data related to noise level distribution in city agglomerations. Specific computational environments,...

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• Low-frequency noise in ZrS3 van der Waals semiconductor nanoribbons

  Publikacja

  • A. Rehman
  • G. Cywiński
  • W. Knap
  • J. Smulko
  • A. Balandin
  • S. Rumyantsev

  - APPLIED PHYSICS LETTERS - Rok 2023

  We report the results of the investigation of low-frequency electronic noise in ZrS3 van der Waals semiconductor nanoribbons. The test structures were of the back-gated field-effect-transistor type with a normally off n-channel and an on-to-off ratio of up to four orders of magnitude. The current–voltage transfer characteristics revealed significant hysteresis owing to the presence of deep levels. The noise in ZrS3 nanoribbons...

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• Global Optimization for Recovery of Clipped Signals Corrupted With Poisson-Gaussian Noise

  Publikacja

  • A. Marmin
  • A. Jezierska
  • M. Castella
  • J. Pesquet

  - IEEE SIGNAL PROCESSING LETTERS - Rok 2020

  We study a variational formulation for reconstructing nonlinearly distorted signals corrupted with a Poisson-Gaussian noise. In this situation, the data fidelity term consists of a sum of a weighted least squares term and a logarithmic one. Both of them are precomposed by a nonlinearity, modelling a clipping effect, which is assumed to be rational. A regularization term, being a piecewise rational approximation of the ℓ0 function...

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• Color transformation methods for dichromats

  Publikacja

  • J. Rumiński
  • J. Wtorek
  • J. Arumińska
  • M. Kaczmarek
  • A. Bujnowski
  • T. Kocejko
  • A. Poliński

  - Rok 2010

  Color blindness is a serious perception problem. Suffering individuals cannot understand messages, which are carrying by many images, especially those, distributed by WWW. In this paper we are proposing three image processing methods to enhance image recognition and understanding by persons with dichromacy. Color difference image is introduced to represent color perception dissimilarity. Two color transformation methods are presented....

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• Computerized Color Processing for Dichromats

  Publikacja

  • J. Rumiński
  • M. Bajorek
  • J. Arumińska
  • J. Wtorek
  • A. Bujnowski

  - Rok 2011

  Artykuł przedstawia opis metod w zakresie symulacji kolorów postrzeganych przez osoby z dichromacją oraz metod rozpoznawania kolorów jak i etykietowania kolorów w obrazach cyfrowych.

• Hexakis(1-methylimidazole-kN3)iron(II) dichloride dihydrate

  Publikacja

  • L. Aparici Plaza
  • K. Kazimierczuk
  • B. Becker

  - ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE - Rok 2006

  Tytułowy związek, [Fe(C4H6N2)6]Cl2.2H2O jest izostrukturalny z odpowiednimi związkami Co, Ni i Ru. W kompleksowym kationie żelazo(II) jest koordynowane oktaedrycznie przez sześć ligandów 1-metyloimidazolowych. Jon ujemny jest agregatem dwóch jonów chlorkowych i dwóch cząsteczek wody połączonych wiązaniami wodorowymi.

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• Chlorek poliglinu w likwidacji skutków rozwoju bakterii nitkowatych

  Publikacja

  • M. Geneja
  • K. Czerwionka
  • W. Bronk

  - Przegląd Komunalny - Rok 2003

  W pracy przedstawiono wyniki badań nad wpływem dawkowania polichlorku glinu na likwidację skutków rozwoju bakterii nitkowatych w gminnej oczyszczalni ścieków w Lubaniu. Wykazano, że w ciągu 10 dni wprowadzania polichlorku glinu przy wielkości dawki ok. 3 g Al3+/(kgsm*d) możliwe było całkowite usunięcie piany biologicznej i znaczne ograniczenie populacji bakterii Microthrix parvicella. Kontynuacja wprowadzania reagenta przez kolejne...

• Biological and mechanical research of titanium implants covered with bactericidal coating

  Publikacja

  • K. Malisz
  • B. Świeczko-Żurek

  - Engineering of Biomaterials / Inżynieria Biomateriałów - Rok 2022

  The paper concerns the biological and mechanical properties of titanium implants with an antibacterial coating. The Ti13Zr13Nb alloy samples were coated with hydroxyapatite (HAp) coatings using the electrophoretic deposition technique (EPD). Subsequently, the surface of the samples was modified with silver, copper, and nickel nanoparticles by the immersion method. Different titanium sample types (i.e. HAp-only and nanometals-enriched...

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• A system for multitask noisy speech enhancement.

  Publikacja

  • A. Czyżewski
  • A. Kaczmarek
  • J. Kotus
  • A. Pawlik
  • A. Rypulak
  • P. Żwan

  - Rok 2004

  W artykule przedstawiono ogolną charakterystyke opracowanego systemu rejestracji i rekonstrukcji mowy. Artykuł zawiera opis składników systemu, ktory jest oprogramowaniem zawierającym zaawansowane narzędzia służące poprawie zrozumiałości mowy. Zaimplementowane narzędzia systemu umożliwiają wyszukiwanie nagrań dźwiękowych i ich obróbkę przy pomocy zaimplementowanych pluginów. W artykule przedstawione wykorzystane w systemie algorytmy...

• Multitask Noisy Speech Enhancement System

  Publikacja

  • A. Czyżewski
  • J. Kotus
  • G. Szwoch
  • M. Dziubiński
  • A. Rypulak
  • A. Pawlik

  - Rok 2005

  W referacie opisano Wielozadaniowy System Poprawy Jakości Sygnału Mowy. Jest to wyspecjalizowany pakiet oprogramowania przeznaczony do rejestrowania sygnału mowy i do poprawy jego jakości oraz zrozumiałości mowy, przy użyciu zaawansowanych procedur cyfrowego przetwarzania sygnału. Pakiet oprogramowania składa się z programów: Rejestrator, Przeglądarka oraz Rekonstruktor. Oprogramowanie to może być użyte w przypadkach, gdy zrozumiałość...

• Determination of magnetisation conditions in a Double-Core Barkhausen Noise measurement set-up

  Publikacja

  • M. Augustyniak
  • B. Augustyniak
  • L. Piotrowski
  • M. Chmielewski

  - JOURNAL OF NONDESTRUCTIVE EVALUATION - Rok 2015

  The magnetic Barkhausen effect is useful forassessing 1D and 2D stress states of ferromagnetic steelobjects. However, its extension to technically importantmaterials, such as duplex anisotropic steels, remains challenging. The determination of magnetisation inside the studied object and the electromagnet for various geometries, materials and magnetisation angles is a key issue.Three-dimensional, dynamic finite element analysis...

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• Estimation of the excitation variances of speech and noise AR-models for enhanced speech coding

  Publikacja

  • M. Kuropatwinski
  • W. Kleijn
  • M. Kuropatwiński

  - Rok 2001

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• Performance Analysis of the "Intelligent" Kirchhoff- Law - Johnson-Noise Secure Key Exchange

  Publikacja

  • J. Smulko

  - FLUCTUATION AND NOISE LETTERS - Rok 2014

  The Kirchhoff-law - Johnson-noise (KLJN) secure key distribution system provides a way of exchanging theoretically secure keys by measuring random voltage and current through the wire connecting two different resistors at Alice’s and Bob’s ends. Recently new advanced protocols for the KLJN method have been proposed with enhanced performance. In this paper, we analyze the KLJN system and compare with the „intelligent” KLJN (iKLJN)...

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• ESTIMATION OF NONSTATIONARY HARMONIC SIGNALS AND ITS APPLICATION TO ACTIVE CONTROL OF MRI NOISE

  Publikacja

  • M. Niedźwiecki
  • M. Meller
  • Y. Kajikawa
  • D. Łukwiński

  - Rok 2013

  A new adaptive comb filtering algorithm, capable of tracking the fundamental frequency and amplitudes of different frequency components of a nonstationary harmonic signal embedded in white measurement noise, is proposed. Frequency tracking characteristics of the new scheme are studied analytically, proving (under Gaussian assumptions and optimal tuning) its statistical efficiency for quasi-linear frequency changes. Laboratory tests...

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• the assessment of the noise-induced harmful effects based on the properties of human hearing system

  Publikacja

  • J. Kotus
  • B. Kostek

  - Rok 2008

  A new way of assessment of noise-induced harmful effects on human hearing system is presented in the paper. The method takes into consideration properties of the human hearing system. The pro-posed method determines the cumulative impact on hearing system produced by the excessive noise. Based on the predicted effects of the noise exposure, the new types of noise indicators were developed. The evaluation of these indicators was...

• Road noise mapping in the city area: measurements compared to model-based estimations

  Publikacja

  • M. Szczodrak
  • A. Czyżewski
  • J. Kotus

  - Rok 2008

  The paper presents an approach to the verification of noise prediction models in selected localization in the city of Gdansk. The experiments described include a comparison between environmentalmeasurement results performed in the terrain and the noise level prediction results. The NMPB-96 (Nouvelle Méthode de Prévision du Bruit) and Harmonoise models outcomes provide the subject ofthe analysis. The proposed solution of continuous...

• The noise-induced harmful effect assessment based on the properties of the human hearing system

  Publikacja

  • J. Kotus
  • B. Kostek

  - Archives of Acoustics - Rok 2008

  A new way of assessment of noise-induced harmful effects on human hearing system is presented in the paper. The method takes into consideration properties of the human hearing system. The pro-posed method determines the cumulative impact on hearing system produced by the excessive noise. Based on the predicted effects of the noise exposure, the new types of noise indicators were developed. The evaluation of these indicators was...

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• <title>New low noise CCD cameras for Pi-of-the-Sky project</title>

  Publikacja

  • G. Kasprowicz
  • H. Czyrkowski
  • R. Dabrowski
  • W. Dominik
  • L. Mankiewicz
  • K. Pozniak
  • R. Romaniuk
  • P. Sitek
  • M. Sokolowski
  • R. Sulej... i 3 innych

  - Rok 2006

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• Multimedia System for Environmental Noise Monitoring. [Multimedialny System Monitorowania Hałasu Środowiskowego]

  Publikacja

  • J. Kotus

  - ACTA ACUSTICA UNITED WITH ACUSTICA - Rok 2006

  IntroductionNumerous reports relating to noise threats in Poland indicate that they occur commonly. The noise has an enormous impact on the health and life quality of the human beings. Noise pollution in Poland is greater than in others UE countries, moreover it has been increased recently. Taking into account 2002/49/WE directive related to the control and assessment of environmental noise a necessity of monitoring these threats...

• Noise spectral density computation based on finite element model of piezoceramic sensor

  Publikacja

  • P. Sedlak
  • J. Majzner
  • L. Grmela
  • L. Hasse

  - Rok 2006

  The high sensitivity with wide bandwidth is required for sensor applications in non-destructive testing (NDT). The sensitivity of piezoceramic sensors demands to minimize their noise especially thermal noise, polarisation noise and low frequency 1/f noise,which are the main sources of voltage or current fluctuation in this sort of sensors. For simplicity, only the piezoceramic part of sensor was under study. the theoretical and...

• Low Frequency Noise Measurement of Reverse Polarized Silicon Carbide Schottky Diodes

  Publikacja

  • A. Szewczyk
  • B. Stawarz-Graczyk

  - Rok 2009

  W artykule przedstawiono wyniki pomiaró szumów cz. wstecznie spolaryzowanych diod Schottky'ego.