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Abstract
The paper presents improved method of time-frequency (TF) analysis of discrete-time signals. The method involves signal's local group delay (LGD) and channelized instantaneous frequency (CIF) to purposely redistribute all Short-time Fourier transform (STFT) lines. Additionally, the energy concentration index (ECI) and some histogram-like statistics are used to evaluate readability of estimated TF distributions of the energy. Recorded acoustic signals such as sound of the Stradivarius violin, a humpback whale song and a theoretical signals such as impulse response of a rigid and tungsten carbide sphere confined in water are employed to test the novel approach.
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- Category:
- Conference activity
- Type:
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Title of issue:
- 58th Open Seminar on Acoustic, T.1, - Gdańsk-Jurata, 2011 strony 137 - 146
- Publication year:
- 2011
- Bibliographic description:
- Czarnecki K., Moszyński M., Rojewski M.: Time-frequency analysis of acoustic signals using concentrated spectrogram// 58th Open Seminar on Acoustic, T.1, - Gdańsk-Jurata, 2011/ ed. eds. Eugeniusz Kozaczka : POlskie Towarzystwo Akustyczne Oddział Gdańsk, 2011, s.137-146
- Verified by:
- Gdańsk University of Technology
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