The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard.

The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard. Correct Answer True

It is False. The hearing threshold is not an invariable fixed intensity above which sound is always heard and below which sound is never heard. In fact, the sensitivity of the auditory mechanism is found to vary with interactions between certain physiological, psychological and physical factors. Therefore, the threshold may be regarded as an intensity range within which sound stimuli at or near the statistically determined threshold may or may not be perceived.
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