The generally accepted standard hearing range for humans is 20 to 20,000 Hz.[2][3][4] In air at atmospheric pressure, these represent sound waves with wavelengths of 17 metres (56 ft) to 1.7 centimetres (0.67 in). Frequencies below 20 Hz are generally felt rather than heard, assuming the amplitude of the vibration is great enough. Sound frequencies above 20 kHz are called ultrasonic.
Sound propagates as mechanical vibration waves of pressure and displacement, in air or other substances.[5] In general, frequency components of a sound determine its "color", its timbre. When speaking about the frequency (in singular) of a sound, it means the property that most determines its pitch.[6] Higher pitches have higher frequency, and lower pitches are lower frequency.
The frequencies an ear can hear are limited to a specific range of frequencies. The audible frequency range for humans is typically given as being between about 20 Hz and 20,000 Hz (20 kHz), though the high frequency limit usually reduces with age. Other species have different hearing ranges. For example, some dog breeds can perceive vibrations up to 60,000 Hz.[7]
In many media, such as air, the speed of sound is approximately independent of frequency, so the wavelength of the sound waves (distance between repetitions) is approximately inversely proportional to frequency.
Gives presence to speech, where labial and fricative sounds lie.
8,192 to 16,384
10th
Brilliance, the sounds of bells and the ringing of cymbals and sibilance in speech.
16,384 to 32,768
11th
Beyond brilliance, nebulous sounds approaching and just passing the upper human threshold of hearing
Oscillogram of a pure tonemiddle C (262 Hz). (Scale: 1 square is equal to 1 millisecond)C5, an octave above middle C. The frequency is twice that of middle C (523 Hz).C3, an octave below middle C. The frequency is half that of middle C (131 Hz).
^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.
^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
^Pilhofer, Michael (2007). Music Theory for Dummies. For Dummies. p. 97. ISBN978-0-470-16794-6.
^Condon, Tim (2003). Elert, Glenn (ed.). "Frequency range of dog hearing". The Physics Factbook. Retrieved 2008-10-22.
April 28, 2024
audio, frequency, audio, frequency, audible, frequency, periodic, vibration, whose, frequency, audible, average, human, unit, frequency, hertz, property, sound, that, most, determines, pitch, sound, measurementscharacteristicsymbols, sound, pressure, particle,. An audio frequency or audible frequency AF is a periodic vibration whose frequency is audible to the average human The SI unit of frequency is the hertz Hz It is the property of sound that most determines pitch 1 Sound measurementsCharacteristicSymbols Sound pressure p SPL LPA Particle velocity v SVL Particle displacement d Sound intensity I SIL Sound power P SWL LWA Sound energy W Sound energy density w Sound exposure E SEL Acoustic impedance Z Audio frequency AF Transmission loss TLvte The generally accepted standard hearing range for humans is 20 to 20 000 Hz 2 3 4 In air at atmospheric pressure these represent sound waves with wavelengths of 17 metres 56 ft to 1 7 centimetres 0 67 in Frequencies below 20 Hz are generally felt rather than heard assuming the amplitude of the vibration is great enough Sound frequencies above 20 kHz are called ultrasonic Sound propagates as mechanical vibration waves of pressure and displacement in air or other substances 5 In general frequency components of a sound determine its color its timbre When speaking about the frequency in singular of a sound it means the property that most determines its pitch 6 Higher pitches have higher frequency and lower pitches are lower frequency The frequencies an ear can hear are limited to a specific range of frequencies The audible frequency range for humans is typically given as being between about 20 Hz and 20 000 Hz 20 kHz though the high frequency limit usually reduces with age Other species have different hearing ranges For example some dog breeds can perceive vibrations up to 60 000 Hz 7 In many media such as air the speed of sound is approximately independent of frequency so the wavelength of the sound waves distance between repetitions is approximately inversely proportional to frequency Frequencies and descriptions editFrequency Hz Octave Description 16 to 32 1st The lower human threshold of hearing and the lowest pedal notes of a pipe organ 32 to 512 2nd to 5th Rhythm frequencies where the lower and upper bass notes lie 512 to 2 048 6th to 7th Defines human speech intelligibility gives a horn like or tinny quality to sound 2 048 to 8 192 8th to 9th Gives presence to speech where labial and fricative sounds lie 8 192 to 16 384 10th Brilliance the sounds of bells and the ringing of cymbals and sibilance in speech 16 384 to 32 768 11th Beyond brilliance nebulous sounds approaching and just passing the upper human threshold of hearing nbsp Oscillogram of a pure tone middle C 262 Hz Scale 1 square is equal to 1 millisecond nbsp C5 an octave above middle C The frequency is twice that of middle C 523 Hz nbsp C3 an octave below middle C The frequency is half that of middle C 131 Hz MIDI note Frequency Hz Description Sound file 0 8 17578125 Lowest organ note n a fundamental frequency inaudible 12 16 3515625 Lowest note for tuba large pipe organs Bosendorfer Imperial grand piano n a fundamental frequency inaudible under average conditions 24 32 703125 Lowest C on a standard 88 key piano source source 36 65 40625 Lowest note for cello source source 48 130 8125 Lowest note for viola mandola source source 60 261 625 Middle C source source 72 523 25 C in middle of treble clef source source 84 1 046 5 Approximately the highest note reproducible by the average female human voice source source 96 2 093 Highest note for a flute source source 108 4 186 Highest note on a standard 88 key piano source source 120 8 372 source source 132 16 744 Approximately the tone that a typical CRT television emits while running source source See also editAbsolute threshold of hearing Hypersonic effect controversial claim for human perception above 20 000 Hz Loudspeaker Musical acoustics Piano key frequencies Scientific pitch notation Whistle registerReferences edit Pilhofer Michael 2007 Music Theory for Dummies For Dummies p 97 ISBN 9780470167946 Hyperphysics Retrieved 19 September 2014 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 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 Definition of SOUND Retrieved 3 October 2016 Pilhofer Michael 2007 Music Theory for Dummies For Dummies p 97 ISBN 978 0 470 16794 6 Condon Tim 2003 Elert Glenn ed Frequency range of dog hearing The Physics Factbook Retrieved 2008 10 22 Retrieved from https en wikipedia org w index php title Audio frequency amp oldid 1166551558, wikipedia, wiki, book, books, library,
