Sound Intensity and Human threshold for hearing

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SUMMARY

The discussion centers on the concept of sound intensity levels and the threshold of human hearing. It establishes that sound intensity levels can be expressed in decibels (dB) and watts per square meter (W/m²). Specifically, options A and B are explored, with a focus on the physical implications of negative values in these units. The consensus indicates that while sound intensity can be below the threshold of hearing, it cannot be negative in a physical sense.

PREREQUISITES
  • Understanding of sound intensity levels in decibels (dB)
  • Knowledge of sound power and area relationships (I = Power/Area)
  • Familiarity with the threshold of human hearing
  • Basic physics concepts related to sound waves
NEXT STEPS
  • Research the relationship between sound intensity and human perception of sound
  • Study the mathematical conversion between decibels and watts per square meter
  • Explore the concept of sound thresholds and their implications in acoustics
  • Learn about the physical properties of sound waves and their measurement
USEFUL FOR

Acoustics researchers, audio engineers, physics students, and anyone interested in the principles of sound and hearing thresholds.

mssweeteypie
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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.
 
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I think you're confusing yourself. Look at the units in answers A and B and ask yourself how each could physically be negative.
 

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