Naslov
Reverberation Time Measurement With Composed Audio Test Signal

Autori
Đurek, Ivan ; Maletić, Mladen ; Domitrović, Hrvoje

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proc. of Seventh International Congress on Sound and Vibration / - Garmisch-Partenkirchen, 2000, 1703-1708

Skup
Seventh International Congress on Sound and Vibration

Mjesto i datum
Garmisch-Partenkirchen, Njemačka, 04.07.2000. - 07.07.2000

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
composed audio test signal; pseudorandom; reverberation time

Sažetak
The composed audio test signal (CATS) is formed by mixing three mutually independent composed sawtooth signals (CSSs), which are a special type of pseudorandom signals. The CATS closely follows the characteristics of natural signals, and its behavior is controlled by the well-defined and configurable parameters. The amplitude probability density function of the CATS follows Gaussian distribution. CATS methods employ efficient cross correlation between input and output to recover the periodic impulse response (PIR) of the system being measured. Since room can be considered as an acoustical transmission system, the impulse response yields a complete description of the sound signal’s changes traveling from one point in room to another. Integrating the square impulse response within specified limits is equivalent to averaging over all possible decay curves which can be obtained at the same place with white noise excitation. Decay curves are based on an exactly reproducible characteristic, namely periodic impulse response. Reverberation time obtained from such curves has greater accuracy than reverberation time obtained in traditional way. This reverberation time measurement method is independent of any accidental circumstances of excitation.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA