models an omnidirectional microphone with an equal response in all
To compute the response of the microphone element for specified directions:
Starting in R2016b, instead of using the
to perform the operation defined by the System
object™, you can
call the object with arguments, as if it were a function. For example,
= step(obj,x) and
y = obj(x) perform
H = phased.OmnidirectionalMicrophoneElement creates
an omnidirectional microphone system object,
that models an omnidirectional microphone element whose response is
1 in all directions.
H = phased.OmnidirectionalMicrophoneElement( creates
an omnidirectional microphone object,
each specified property set to the specified value. You can specify
additional name-value pair arguments in any order as (
Operating frequency range
Specify the operating frequency range (in Hz) of the microphone
element as a 1x2 row vector in the form of
Baffle the back of microphone element
Set this property to
When the value of this property is
|directivity||Directivity of omnidirectional microphone element|
|pattern||Plot omnidirectional microphone element directivity and patterns|
|patternAzimuth||Plot omnidirectional microphone element directivity or pattern versus azimuth|
|patternElevation||Plot omnidirectional microphone element directivity or pattern versus elevation|
|plotResponse||Plot response pattern of microphone|
|step||Output response of microphone|
|Common to All System Objects|
Allow System object property value changes
Create an omnidirectional microphone. Find the microphone response at 200, 300, and 400 Hz for the incident angle 0° azimuth and 0° elevation. Then, plot the azimuth response of the microphone at three frequencies.
microphone = phased.OmnidirectionalMicrophoneElement(... 'FrequencyRange',[20 2e3]); fc = [200 300 400]; ang = [0;0]; resp = microphone(fc,ang);
Plot the response pattern. Response patterns for all three frequencies are the same.
Usage notes and limitations:
plotResponse methods are not supported.
See System Objects in MATLAB Code Generation (MATLAB Coder).