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November 4, 2009 7:13am UTC

How to set Acoustic Source

Hi!

I have a question on the Acoustics module in Comsol, regarding how to set a monopole acoustic source.

I have a point acoustic source characterized by a modulated sin wave:

In Matlab coding,

y=-sin(2.*pi.*Freq.*Ts).*hanning(length(Ts))'

Here, the acoustic source is described in terms of particle displacement, y.

However, I understand that in Comsol, to set a point source, we are supposed to go to Physics > Point settings > Pressure acoustics, and select the type of source as flow, intensity and power.

My question is, how do we convert the description of the point source from displacement to a description in terms of either flow, intensity or power?

Thanks!

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October 14, 2010 6:13am UTC in response to Bhargavaram Pachala

Re: How to set Acoustic Source

Hi,

I have the same problem as you had faced. Will you please tell me, how did you solve it ?

Thanks in advance,

Kiran

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June 5, 2011 2:54am UTC in response to Oh Sue Ann

Re: How to set Acoustic Source

i have the similar question for setting the dipole source

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September 13, 2011 8:54am UTC in response to Oh Sue Ann

Re: How to set Acoustic Source

Hi all

When entering a flow point source in the frequency domain, the source amplitude S has the dimension m^3/s. In order to set the "radial displacement" U0 of the source you can enter S = U0*acpr.iomega*4*pi.

Best regards
Mads

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