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### 8 Cards in this Set

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• Back
 what is the speed of sound? 1,130 feet per second what is the range of human hearing in frequency? 20-20,000 hertz What is human hearing range in amplitude? -1/4 dB to 140 dB What is the logarithmn of 10,000,000? 7 (there are seven 0's 10^7 how many times more powerful is 80dB than 20dB? 1,000,000 when two identical waves are in phase what happens and what do we call it? it gets louder and is called an interference what do we use to measure amplitude decibel what is an area of higher than normal pressure in a wave? compression