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SOUND TRANSMISSION CLASS (STC): A single-number rating obtained by classifying the measured values of Sound Transmission Loss in accordance with ASTM Standard E 413, “Classification for Sound Rating Insulations”. NOTE: the length ratio between adjacent pipes is the twelfth root of two. After modification, the unoccupied reverberation time was reduced to a desirable 0.5 seconds in the middle frequencies. Application areas include speakers, microphones, hearing aids, and sonar devices, to name a few.

Pages: 1216

Publisher: McGraw-Hill Higher Education; 3 edition (January 23, 2015)


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