Custom Microphone Element

Support for Custom Microphone Elements

You can model a microphone with a custom response pattern using phased.CustomMicrophoneElement System object™. The total response of a custom microphone element is a combination of its frequency response and spatial response. phased.CustomMicrophoneElement calculates both responses using nearest neighbor interpolation and then multiplies them to form the total response. When the PolarPatternFrequencies property value is nonscalar, the object specifies multiple polar patterns. In this case, the interpolation uses the polar pattern that is measured closest to the specified frequency. When you use phased.CustomMicrophoneElement, you must specify these microphone attributes.:

Frequencies where you specify your response using the FrequencyVector property.
Response corresponding to the specified frequencies using the FrequencyResponse property.
Frequencies and angles at which the microphone’s polar pattern is measured.
Magnitude response of the microphone.

Custom Cardioid Microphone Pattern

Open Live Script

Create a custom cardioid microphone, and plot the power response pattern at 500 and 800 Hz.

sCustMic = phased.CustomMicrophoneElement;
sCustMic.PolarPatternFrequencies = [500 1000];
sCustMic.PolarPattern = mag2db([...
    0.5+0.5*cosd(sCustMic.PolarPatternAngles);...
    0.6+0.4*cosd(sCustMic.PolarPatternAngles)]);

pattern(sCustMic,[500,800],[-180:180],0,'Type','powerdb')

Figure contains an axes object. The hidden axes object contains 4 objects of type line, text. These objects represent 500 Hz Ⓐ , 800 Hz .