A Source of Sound Has an Intensity and When

question 63

Multiple Choice

A source of sound has an intensity and when its sound level is measured at a fixed distance the value found is 70 dB. The source then has its intensity increased to and when its sound level is measured at the same distance the value found is 96 dB. What is the ratio ?

• A) 26
• B) 400
• C) 600
• D) 14

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Definitions:

Object Permanence

The realization that items persist in existence even when they are not visible, audible, or perceptible in any way.

Rehearsal

A mnemonic strategy of repeating information (either aloud or silently) to facilitate retention and later retrieval.

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