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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Radiation posted by Bill the K on November 19, 2024 at 18:20:06:
Gosh, part A is acoustic size, how large is what ever it is compared to the wavelength being produced.
The problem here is there is a 1000:1 difference in size from 20Hz to 20KHz.
You can figure the wavelength size in inches using 1132ft/sec X 12 inches / the frequency
For a simple piston source, one finds that if the diameter is 1/4 wavelength or less, it is an omni source, radiates equally in every direction.
As the frequency climbs and the WL is smaller, when it is about 1 WL across, the radiation pattern has narrowed to around 90 degrees forward. going higher in frequency, the radiation patterns is one of lobes and nulls across the front.
It is the complex radiation that your ears use to locate the physical distance by ear and makes the speaker "stand out" as sources in stereo where a center phantom image is desired.
There is a lot of mystery, some in the aid of sales but also a great deal is known.
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Follow Ups
- RE: Radiation - tomservo 11:16:06 11/20/24 (0)
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