Sound Intensity and Human threshold for hearing


by mssweeteypie
Tags: hearing, human, intensity, sound, threshold
mssweeteypie
mssweeteypie is offline
#1
Feb10-08, 11:53 AM
P: 1
Is it possible to have a negative sound intensity level?
A sound that is below the threshold of human hearing has......

(A) a negative intensity level (in dB).
(B) a negative intensity (in W/m^2 ).
(C) an intensity level of zero.
(D)an intensity level less than 1 dB , but greater than 0.

I think I know the answer but I don't want to guess wrong and lose points.



Does it have to do with anything like I/Io or I=power/area ??


I think the answers is A or B..but I don't see the difference in between dB and W/m^2 i thought they are the same thing.
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
TVP45
TVP45 is offline
#2
Feb10-08, 02:08 PM
P: 1,130
I think you're confusing yourself. Look at the units in answers A and B and ask yourself how each could physically be negative.


Register to reply

Related Discussions
Sound intensity General Physics 8
[SOLVED] sound intensity - the threshold of pain Introductory Physics Homework 2
Shortest Non-Ionizing Wavelength for human body at any intensity/duration? General Physics 4
Sound Wave Intensity/Sound Level Introductory Physics Homework 1
Sound Intensity and Sound Waves Introductory Physics Homework 5