????

??????? ????
?????? ???????	f
??????? ???????
???? ??????? ??????	????
??????? ??????

?????? ?? ????? ?????? ??? ????? ??? ???? ????. ^[3]^[4]^[5] ?????? ?? ???? ?????? ?? ???? ???? ????? ?? ???? ???? ????? ?? ???? ????????????? . ????? ???? ?????? ??? ??? 1960 ????? ?????? (Hz ) ??? ????? ${\frac {1}{sec}}$ ?? 1/?????.

??????? ???? ????? ????? ??? ????? ????? ???? . ???? ???? ???? ?????? 1Hz ??? ???? ??? ???? ????? ?? ???? ?? ???? ????? ?????. ?????? ??????? ?????? ??????? ??? ???? ?? ?????? ?????? ?????? ?? ????? ?? ???? ??? ???? ?? ????? ??? ?? ?????? ???????. ??????? ??? ????? ????????? ?? ?????? ?? ??????? ??? ????? ??????? ?? ???? ???? ??? ?????? .

**????? ???? ?????? ??????. ??????? ??? ????? ?? ??? ?????? ??? ????? ???? ?????.**

????? ?????? [ ??? ]

????? ??????? ??? ?????? ?????? ???? ??? ????? ???? ??????? ???? ?????? ???? ?????? ?? ???????? ???? ???? ????? ??????. ?????? ????? f ?? $\nu$ ?????? ??????? ?? ?????? ?? ???????? ????????? ???????????? ????????? ????????? ???? ????? ???????? ??????.

?????? ?????????? ????? ??????? ?? ??? Hz ?? ?????? (????? ????? ${\frac {1}{sec}}$ ) ??? ??? ?????? ????????? ???????? ??????? ???? . ??? ???? ??????? ???? ??? ????? ?????? ?? ?? 1Hz ? ???? ??? ????? ???? ???? ?? ?????? ???? ??? ??? 2Hz ? ?????? ???? ?????? ?? ?? ?????? ?????. ???? ????? ???? ?????? ?? $T$ ? ???? ??????? ???? ???? ?????? ???????:

f={\frac {1}{T}}

???? ?? ??? ?????? ??? ????? ???????? ???? ??? ?????? ???? ?????? ??? Hz ? ???? ???? ??? ?????? ?? ???????.

?? ??? ??????????? ????? ????? ????? ????? ???????. ??????? ????? ???? ??? ????? ? ?????? ???? ≪???? ?? ???????≫ ?? BPM) Beats per Minute)? ???? ?????? ?????? ?? ???? ???????? ????? ??????? . ?? ?????? ????????? ?????? ??????? ???? ≪???? ?? ???????≫ ?? rpm) Revolutions per Minute) ????? ???????. ?????? ??? ??????? ??? ??? Hz ??? ?????? ??? $60$ .

???? ??????? [ ??? ]

????? ????? ????? ??? ??? ????? ??? ??????? ???? ?????? ??? ??????? ?? ???? ?????? ??? ?? ?????? ??? ???? ??? ??????.

?? ??????? ??? ?????? ??? ??? ??????? ????? ???????? ???? ?????? ??????? ??????? ???? ????? ?????? ?? ?????????? ????? ?? ???? ??? ????????? ??????? ???? ???? ?????? ??????. ??? ???? ??????? ?? ?? ???? ????? ??????? ????? ??????? ????????. ??? ??????? ??????? ???? ??? ??? ?????? ?? ?????? ?????? ??? ??? ??? ????? ????? ?? ??? ??? ????? ???????? ? ???? ???? ??? ?????? ?? ??????? ?? f . ???? ???????? ??????? ?????? ???? ???? ?????? ????? ???????? ?????? ???? ??? ?????? ???? .

??????? ??????? [ ??? ]

???????? ????? ?? ???? ??? ??? ?? ??????? ????????? (??? ????? ?????? ) ????????? ? ???? ???? ?????? ????? ????? ??? ????? ?????? ???? ?????? ????? ??????? :

f={\frac {v}{\lambda }}

???? ??:

f

?? ????? ??????

v

?? ??????

\lambda

?? ??? ??????

?? ?? ????? ????? ????? ??? ??????? ????? ??????? ??? ?????? ??? ??? ??????? ?????? ????? ??? ????? ???? ??????? ??? ???? ?????? ?????. ?? ??????? ????????????????? ?????? ?????? $v$ ????? ??????? $c$ ??????? ??? ???? ?????.

??? ?????? ????? ?????????????? ???? ?? ???? ????? ????? (?? ???? ???? ??????? ?????????????? ??? ??? ??? ??????) ?? ??? ?? ????? ?????? ????? ??? ??? ?? ????? ?????? ???? ?????? ??? ??????? ???????? ?? ??? ???? ??????? ??????? ??? ????? ???? ??????? ????? .

????? [ ??? ]

?????? ????? ???????? ?? ????? ??????? ?????? ?????? ??????? ??? 20 ????? ?? ??????? ? 20.000 ?????/???????. ?? ??????? ???? ??????? ???????? ???? ????????? ???? ??? 20 kHz ? ???? ???? ????? ???? ??? ???????? ???????? ????? ???? ??? ??????? ?? ????.
??? ????? ?????? ???????? ?? ??????? ??????????? ???????? ?? ?????? ???????? ????????? ????? ???? ?? 50Hz (?? 50 ????? ?? ???????)? ?????? ???? ????? 60 ?????/??????? ( 60Hz ) ?? ???? ????????????.
????? ????? ?????? ?? ????? ?????????????? ?????? ??? 430 ???? ???? (??? ????) ??? 750 ???????? (??? ??????).

????? ???? ?? ??????? [ ??? ]

?????? ?????? : ???? ?????? ????? ???????? $\omega$ ? ???? ???? ?????? ?? ??? ???? ??? ?????? ???? ??????? ????? ? ?????:

\omega =2\pi f

???? ?????? ???????? ?????? ?????? ?? ???? ??? ??????? rev/s.

???? ????? ???? ???? ??? ????????? ??? ????????. ??????? ?? ?????? ?????? ?? ???? ???? ?? ???? ??????? ?? ???? ?????? ?????? ??????. ???????? ?????? ???? ?? ????? ??? ???? ??????? ??? ????? ?????? ??????? ???????? ?? ????? ?????? ?? ???? ????? ????? ??????. ??? ??? ?????? ?????? ?????? ????? ???? ???????? ??????.

???? ????? [ ??? ]

????? [ ??? ]

^ Quantities and units?Part 3: Space and time (???????????) (1st ed.), International Organization for Standardization , 1 Mar 2006, 3-15.1, QID : Q26711932
^ Quantities and units ? Part 3: Space and time (??????????? ?????????) (2nd ed.), International Organization for Standardization , 2019-10, 3-17.1, QID : Q90137277 {{ ??????? }}: ???? ?? ??????? ??: |publication-date= ( help )
^ Pilhofer? Michael (2007). Music Theory for Dummies . For Dummies. ?. 97. ISBN : 9780470167946 . ????? ?? ????? ?? 2017-07-10.
^ "Definition of SOUND" . ????? ?? ????? ?? 2017-11-23 . ???? ???? ?????? 2016-10-03 .
^ Elert? Glenn? Timothy Condon (2003). "Frequency Range of Dog Hearing" . The Physics Factbook. ????? ?? ????? ?? 2006-07-09 . ???? ???? ?????? 2008-10-22 .

???? ?? ???????? ??????? :

??? ?????? ????? ?? ?????.

[wikidata-df758268555dfc94a584abb4f5f8b9a76dfbe7e3-1] Quantities and units?Part 3: Space and time (???????????) (1st ed.), International Organization for Standardization , 1 Mar 2006, 3-15.1, QID : Q26711932

[wikidata-fe995fb00c8ca395ae5a06c1c8de23a921f88304-2] Quantities and units ? Part 3: Space and time (??????????? ?????????) (2nd ed.), International Organization for Standardization , 2019-10, 3-17.1, QID : Q90137277 {{ ??????? }}: ???? ?? ??????? ??: |publication-date= ( help )

[3] Pilhofer? Michael (2007). Music Theory for Dummies . For Dummies. ?. 97. ISBN : 9780470167946 . ????? ?? ????? ?? 2017-07-10.

[4] "Definition of SOUND" . ????? ?? ????? ?? 2017-11-23 . ???? ???? ?????? 2016-10-03 .

[5] Elert? Glenn? Timothy Condon (2003). "Frequency Range of Dog Hearing" . The Physics Factbook. ????? ?? ????? ?? 2006-07-09 . ???? ???? ?????? 2008-10-22 .

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[5]