Hello
Apart from the mentioned book of Neumann, I could recommend Sengpiel
Audio. It is still available in the internet and supported by the son of
EBS (AFAIK).
You will find many answers there. Some pages are available in english
too, such as the conversion calculations:
http://www.sengpielaudio.com/Calculations03.htm
As a quick reply to your questions: These patterns are generated by more
than one diapgragm and / or effects caused by substraction of the sound
from different directions eventually making use of accoustic time
delays. For instance the Cardioid mic does:
http://www.sengpielaudio.com/PressureGradientAndPhase.htm
But it is important to understand, that these abstractions are focussing
ideal cases. Practically no microphone comes close to these simple cases
of behaviour.
As entry point, this page might be of interest:
http://www.sengpielaudio.com/HejiaE.htm
It also has visualisation of the mic systems.
GTX
Am 29.05.2018 um 03:53 schrieb Rich Breen:
Microphones can be either pressure or velocity; any basic microphone
design book/paper will cover the differences.
best,
rich
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