Absolute Threshold of Hearing: Difference between revisions
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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 following are curves of the ATH for several age groups over [[frequency]]. Zwicker approximated these curves from experiments on a number of subjects: | ||
[[Image:ATH.png|frame|none|ATH graph for different age-groups]] | [[Image:http://www.rarewares.org/wiki/images/8/82/ATH.png|frame|none|ATH graph for different age-groups]] | ||
The ATH is the simplest property of human hearing to exploit in designing a lossy audio codec. | The ATH is the simplest property of human hearing to exploit in designing a lossy audio codec. | ||
Revision as of 12:17, 23 October 2004
The absolute threshold 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.
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 in designing a lossy audio codec.