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Author Topic: Speaker measurement  (Read 11352 times)

David Sturzenbecher

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Re: Speaker measurement
« Reply #30 on: February 21, 2016, 09:31:49 am »

why would a smaller diameter be better ?

Jeff,
Microphones are just like speakers.  Larger microphones (in general) have more directionality then smaller ones.   The difference is that speakers want to control all frequencies, where as an omni mic wants to have control over none of the frequencies.     The idea of a omni mic is to represent a point source in space, so it needs to take up a little space as possible.   If your microphone is physically large, compared to the wavelength it is capturing, its response will vary greatly with the arrival angle of the wave.

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Ivan Beaver

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Re: Speaker measurement
« Reply #31 on: February 21, 2016, 10:26:34 am »

Jeff,
Microphones are just like speakers.  Larger microphones (in general) have more directionality then smaller ones.   The difference is that speakers want to control all frequencies, where as an omni mic wants to have control over none of the frequencies.     The idea of a omni mic is to represent a point source in space, so it needs to take up a little space as possible.   If your microphone is physically large, compared to the wavelength it is capturing, its response will vary greatly with the arrival angle of the wave.
And to add-you want the mic to present as little an influence over the sound as possible.

The larger it is-the more it is going to influence what it is "hearing".

A small dot that is omni is the best way.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

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ProSoundWeb Community

Re: Speaker measurement
« Reply #31 on: February 21, 2016, 10:26:34 am »


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