Sound Intensity: dB vs dB(A) - What's the Difference?

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Homework Help Overview

The discussion revolves around the differences between sound intensity levels measured in decibels (dB) and the A-weighted decibels (dB(A)). Participants are exploring the implications of these measurements in the context of sound perception and hearing damage.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the distinction between dB and dB(A), with some suggesting that dB(A) represents average levels. Others are discussing the frequency weighting applied in the dB(A) scale and its relevance to human hearing.

Discussion Status

The conversation is ongoing, with various interpretations of the dB and dB(A) scales being explored. Some participants have provided insights into the frequency considerations of the dB(A) scale, while others are still seeking a clearer understanding of the mathematical relationship between the two scales.

Contextual Notes

There is a reference to external resources for further information, indicating that participants may be looking for additional context or clarification regarding the topic.

EIRE2003
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sound intensity level can be measured in dB & dB (A). What is the difference between the 2 scales?
 
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I think dB(A) is average decibel levels.
 
The dB (Adjusted) scale takes into account the fact that the frequencies between 2,000 and 4,000 Hz cause resonance in the human ear canal and so are more damaging to our hearing. Sound intensity level meters which use the dB (A) scale therefore give these frequencies a certain weighting when they are detected because higher frequencies such as 5,000 Hz would actually be less damaging to the ear due to lack of resonance in the ear canal. However I have no idea what the exact mathematical link between the two scales is, sorry.
 
See this: http://www.safetyline.wa.gov.au/institute/level2/course18/lecture54/l54_09.asp
 
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