Physics Forums

Physics Forums (http://www.physicsforums.com/index.php)
-   General Engineering (http://www.physicsforums.com/forumdisplay.php?f=113)
-   -   Frequency and period question? (http://www.physicsforums.com/showthread.php?t=592387)

dikraduni Apr1-12 08:51 AM

Frequency and period question?
 
I was wondering that the annoying buzzing sound from a mosquito is produced when it flaps its wongs at an average rate of 600 flaps per second.
a) what is the frequency of the sound waves?
b) what is the period of these sound waves?

sophiecentaur Apr1-12 03:22 PM

Re: Frequency and period question?
 
Frequency is the number of cycles (flaps) per second. Unit is Hz.
Period is 1/frequency. Unit is s.

Bobbywhy Apr1-12 10:13 PM

Re: Frequency and period question?
 
"All human beings with normal audition detect, the annoying for us, buzz produced by mosquitoes while flying. This sound is the by-product of their wing beat, and its fundamental frequency is in the range between 180 and 800 cycles per second (Hz), varying with species, sex, age and temperature."
http://bugjammer.com/reports/coro/index.htm

"There are variations in the values of the frequency at which mosquitoes beat their wings. Sources show this value ranging from 250 to 1000 Hz."
http://hypertextbook.com/facts/2000/DianaLeung.shtml

For a .wav file you can listen to:
http://www.acoustics.org/press/132nd/3pab10.html

Karimspencer May8-12 12:39 PM

Re: Frequency and period question?
 
The frequency is = to the number of vib. per sec. so the f of the buzzing sound is 600 Hz
and the period is 1/f =1/600

Your welcome.


All times are GMT -5. The time now is 01:23 PM.

Powered by vBulletin Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
© 2014 Physics Forums