How loud must a sound be (in dB) before a human can hear it?
2006-11-11 02:58:25 · 10 answers · asked by Rich 5 in Science & Mathematics ➔ Physics
No, 20Hz is a frequency. I want a volume in dB. You know, how loud it is. Hz is not a measurement of how loud something is.
2006-11-11 03:05:38 · update #1
dB dB dB dB. Decibels. Have I made it clear enough. ANSWER IN DECIBELS (thats dB.) Get it?
2006-11-11 03:06:34 · update #2
Thank you Steve M, you must be the ONLY person who has actually read my question. And no Kizzy (and everyone else):-
Hz is a measurement of FREQUENCY (that's pitch to you)
dB is a measurement of the level of sound (that's how loud it is to you.) Can you see the difference?
2006-11-11 03:13:44 · update #3
Thank you Steve M, you must be the ONLY person who has actually read my question. And no Kizzy (and everyone else):-
Hz is a measurement of FREQUENCY (that's pitch to you)
dB is a measurement of the level of sound (that's how loud it is to you.) Can you see the difference?
2006-11-11 03:13:45 · update #4
The threshold of hearing is assigned a sound level of 0 decibels
Here you can find a table with different levels.
http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/sound/u11l2b.html
2006-11-11 03:29:56 · answer #1 · answered by Dr. J. 6 · 1⤊ 0⤋
Ignore all the references to 20 Hz
O dB, the threshold intensity for human hearing is accepted as 10^-12 W/m^2.
It's a logarithmic scale, so 1 (=10^0) W/m^2 is rated as 12 B or 120 dB.
2006-11-12 08:29:27 · answer #2 · answered by DriverRob 4 · 1⤊ 0⤋
The lower basses are about 15 to 20 Hz, depending on the quality of the personal ears.
With a lower frequency the eyes can follow the movement of a loud speaker !!
Th
2006-11-11 03:12:57 · answer #3 · answered by Thermo 6 · 0⤊ 1⤋
man can hear a low frequency sound of 20 Hz and a intensity of 10^-12 watt/m^2
2006-11-11 03:04:34 · answer #4 · answered by sudhan 2 · 1⤊ 1⤋
The audible frequency range is 300Hz to 3kHz.Outwith this range at the extreme ends is Extremely low frequency up to extremely high frequency with some in between LF,MF.HF,VHF,UHF.etc.
So the wave form your talking about within the audible frequency range all depends how powerfully it is transmitted which can either be measured in Watts or DB's.So It is any transmission within the audible range all depends how good your hearing is.I'm obviously talking about the human audible range!
2006-11-11 06:45:18 · answer #5 · answered by Anonymous · 0⤊ 1⤋
20 Hz
2006-11-11 03:02:03 · answer #6 · answered by krishna k 2 · 0⤊ 1⤋
The decibel scale defined 0dB as the limit of human hearing.
2006-11-11 03:06:50 · answer #7 · answered by Anonymous · 1⤊ 0⤋
Do electricians doit till it Hz?
=kizzy=
2006-11-11 03:11:04 · answer #8 · answered by Kizzy_ 5 · 0⤊ 1⤋
minimum of 0 db is equal to 20hz(mythbusters rocks)
2006-11-12 01:39:16 · answer #9 · answered by carol.pain1 1 · 0⤊ 1⤋
It is 10^ (-12W ). this is the absolute threshold level of the human ear
2006-11-11 05:42:45 · answer #10 · answered by maussy 7 · 0⤊ 1⤋