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Audio frequency
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<h2 id="frequencies-and-descriptions">Frequencies and descriptions</h2> <table><tbody><tr><th>Frequency (Hz)</th><th><a href="/facts/Octave/RA4gWvkV">Octave</a></th><th>Description</th></tr><tr><td>16 to 32</td><td>1st</td><td>The lower human threshold of hearing, and the lowest pedal notes of a pipe organ.</td></tr><tr><td>32 to 512</td><td>2nd to 5th</td><td>Rhythm frequencies, where the lower and upper bass notes lie.</td></tr><tr><td>512 to 2,048</td><td>6th to 7th</td><td>Defines human <a href="/facts/Speech_intelligibility/PVwX3CP9">speech intelligibility</a>, gives a horn-like or tinny quality to sound.</td></tr><tr><td>2,048 to 8,192</td><td>8th to 9th</td><td>Gives presence to speech, where <a href="/facts/Labial_consonant/bv4MqTMf">labial</a> and <a href="/facts/Fricative/1FQuuhfX">fricative</a> sounds lie.</td></tr><tr><td>8,192 to 16,384</td><td>10th</td><td>Brilliance, the sounds of bells and the ringing of cymbals and <a href="/facts/Sibilance/5ejwC21e">sibilance</a> in speech.</td></tr><tr><td>16,384 to 32,768</td><td>11th</td><td>Beyond brilliance, nebulous sounds approaching and just passing the upper human threshold of hearing</td></tr></tbody></table> <table><tbody><tr><th>MIDI note</th><th>Frequency (Hz)</th><th>Description</th><th>Sound file</th></tr><tr><td>0</td><td>8.17578125</td><td>Lowest <a href="/facts/Organ_(music)/QjxVlXU5">organ</a> note</td><td>n/a (<a href="/facts/Fundamental_frequency/TJBJKHow">fundamental frequency</a> inaudible)</td></tr><tr><td>12</td><td>16.3515625</td><td>Lowest note for tuba, large pipe organs, <a href="/facts/B%25C3%25B6sendorfer/Vq0XeRN3">Bösendorfer</a> Imperial grand piano</td><td>n/a (<a href="/facts/Fundamental_frequency/TJBJKHow">fundamental frequency</a> inaudible under average conditions)</td></tr><tr><td>24</td><td>32.703125</td><td>Lowest C on a standard 88-key <a href="/facts/Piano/lRI60lQK">piano</a></td><td></td></tr><tr><td>36</td><td>65.40625</td><td>Lowest note for <a href="/facts/Cello/IeYEXr96">cello</a></td><td></td></tr><tr><td>48</td><td>130.8125</td><td>Lowest note for <a href="/facts/Viola/l869ofuf">viola</a>, <a href="/facts/Mandola/2BgByJmY">mandola</a></td><td></td></tr><tr><td>60</td><td>261.625</td><td><a href="/facts/Middle_C/FdvRz0zL">Middle C</a></td><td></td></tr><tr><td>72</td><td>523.25</td><td>C in middle of <a href="/facts/Treble_clef/a3FBqdAf">treble clef</a></td><td></td></tr><tr><td>84</td><td>1,046.5</td><td>Approximately the highest note reproducible by the average female <a href="/facts/Human_voice/RPzaPWwh">human voice</a></td><td></td></tr><tr><td>96</td><td>2,093</td><td>Highest note for a <a href="/facts/Flute/bByjt2vu">flute</a></td><td></td></tr><tr><td>108</td><td>4,186</td><td>Highest note on a standard 88-key piano</td><td></td></tr><tr><td>120</td><td>8,372</td><td></td><td></td></tr><tr><td>132</td><td>16,744</td><td>Approximately the tone that a typical <a href="/facts/CRT_television/8moTsqhB">CRT television</a> emits while running.</td><td></td></tr></tbody></table> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Absolute_threshold_of_hearing/Fn3TzQ3p">Absolute threshold of hearing</a></li> <li><a href="/facts/Hypersonic_effect/PmsqlBQG">Hypersonic effect</a>, controversial claim for human perception above 20,000 Hz</li> <li><a href="/facts/Loudspeaker/tqEjnJ2z">Loudspeaker</a></li> <li><a href="/facts/Musical_acoustics/Ph6odoAc">Musical acoustics</a></li> <li><a href="/facts/Piano_key_frequencies/lRaf1MAS">Piano key frequencies</a></li> <li><a href="/facts/Scientific_pitch_notation/rq2QnnyE">Scientific pitch notation</a></li> <li><a href="/facts/Whistle_register/bcUyzyRS">Whistle register</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Pilhofer, Michael (2007). Music Theory for Dummies. For Dummies. p. 97. ISBN 9780470167946. <a href="9780470167946" target="_blank">9780470167946</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Hyperphysics". Retrieved 19 September 2014. <a href="http://hyperphysics.phy-astr.gsu.edu/hbase/sound/earsens.html" target="_blank">http://hyperphysics.phy-astr.gsu.edu/hbase/sound/earsens.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Heffner, Henry; Heffner, Rickye (January 2007). "Hearing Ranges of Laboratory Animals". Journal of the American Association for Laboratory Animal Science. 46 (1): 20–2. PMID 17203911. Retrieved 19 September 2014. <a href="http://www.ingentaconnect.com/content/aalas/jaalas/2007/00000046/00000001/art00003" target="_blank">http://www.ingentaconnect.com/content/aalas/jaalas/2007/00000046/00000001/art00003</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Rosen, Stuart (2011). Signals and Systems for Speech and Hearing (2nd ed.). BRILL. p. 163. For auditory signals and human listeners, the accepted range is 20Hz to 20kHz, the limits of human hearing <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Definition of SOUND". Retrieved 3 October 2016. <a href="http://www.merriam-webster.com/dictionary/sound" target="_blank">http://www.merriam-webster.com/dictionary/sound</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Pilhofer, Michael (2007). Music Theory for Dummies. For Dummies. p. 97. ISBN 978-0-470-16794-6. <a href="978-0-470-16794-6" target="_blank">978-0-470-16794-6</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Condon, Tim (2003). Elert, Glenn (ed.). "Frequency range of dog hearing". The Physics Factbook. Retrieved 2008-10-22. <a href="https://hypertextbook.com/facts/2003/TimCondon.shtml" target="_blank">https://hypertextbook.com/facts/2003/TimCondon.shtml</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> </ol>