Multiple choice question for engineering Set 1 1. How are sound waves with frequency of 20Hz to 20,000Hz termed? a) Inaudible sounds b) Infrasonics c) Ultrasonics d) Audible sound AnswerAnswer: d [Reason:] Sound waves below the frequency of 20Hz are infrasonics. Sound waves above 20,000Hz are ultrasonics. Both are inaudible. Sound waves between 20Hz to…
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