In analyzing the sensitivity of the ear, we noted that sounds in the middle frequency range can vary in amplitude by a factor of a million to one and still be within the receptive capability of the ear. The response of the system to this large variation in amplitude or intensity is to register a difference in loudness. Thus loudness is the subjective parallel response to physical changes in intensity of sound much as pitch response parallels changes in frequency.
KeywordsSound Pressure Sound Pressure Level Sensation Level Weber Fraction Complex Sound
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