- #1
classicswiss
- 2
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- Homework Statement
- acoustics type question on reflection
- Relevant Equations
- see below
Hi, hopefully someone can help with showing me how I can work this one out as I am new to the topic area and a bit stumped.
A piece of machinery is emitting a sound power level of 100 dB at 40 kHz. Calculate the level of the return signal after reflection from a wall 5 m away using the following:
Reflection coefficient of the wall= 0.6
Air absorption=1.39 dB/m
Directivity angle of the sound emission from the machine= 48 degrees
any thoughts?
A piece of machinery is emitting a sound power level of 100 dB at 40 kHz. Calculate the level of the return signal after reflection from a wall 5 m away using the following:
Reflection coefficient of the wall= 0.6
Air absorption=1.39 dB/m
Directivity angle of the sound emission from the machine= 48 degrees
any thoughts?