Absolute Threshold of Hearing: Difference between revisions

Revision as of 18:48, 18 January 2006

The Absolute Threshold of Hearing (ATH) is the volume level at which one can detect a particular sound 50% of the time. If one has a low absolute threshold, it means that he is able to detect small amounts of stimulation, and thus is more sensitive. If one has a high absolute threshold, then he requires more stimulation and thus is less sensitive.

$T_{q} (f) = 3.64 * (\frac{f}{1000})^{-} 0.8 - 6.5 e^{-} 0.6 (\frac{f}{1000} - 3.3)^{2} + 1 0^{-} 3 (\frac{f}{1000})^{4}$

The following are curves of the ATH for several age groups over frequency. Zwicker approximated these curves from experiments on a number of subjects:

The ATH is the simplest property of human hearing to exploit when designing a psychoacoustics model.

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 The '''Absolute Threshold of Hearing''' ('''ATH''') is the volume level at which one can detect a particular sound 50% of the time. If one has a low absolute threshold, it means that he is able to detect small amounts of stimulation, and thus is more sensitive. If one has a high absolute threshold, then he requires more stimulation and thus is less sensitive.
+<math>T_q(f) = 3.64 * (\frac{f}{1000})^-0.8 - 6.5e^-0.6(\frac{f}{1000}-3.3)^2 + 10^-3(\frac{f}{1000})^4</math>
 The following are curves of the ATH for several age groups over [[frequency]]. Zwicker approximated these curves from experiments on a number of subjects: