Hearing is expressed in decibels,or units of loudness. In decibels the softest sound a normal ear can hear is:

Name: Hearing is expressed in decibels,or units of loudness. In decibels the softest sound a normal ear can hear is:
Brand: Quizplus
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Question

Quizplus · Accepted Answer

By definition,0 decibels is the softest sound the normal ear can hear. Ten decibels is the sound of the heartbeat or the rustling of leaves. The range of normal conversation is 40 to 50 decibels. The noise of a train is approximately 100 decibels.

Hearing Is Expressed in Decibels,or Units of Loudness