Multiple superimposed audio frequency test system and sound chamber with attenuated echo properties

An audio test system, comprising:

• a controller configured to generate a composite audio signal of multiple different audio signal frequencies,
• the controller further configured to receive test signals output from a device under test in response to the composite audio signal, the controller further configured to separate out different frequency components that correspond to the different audio signal frequencies in the composite audio signal and use the different frequency components to analyze operating characteristics of the device under test;
• a speaker for outputting the composite audio signal;
• and
• a support structure for holding the device under test and rotating the device under test in at least one of a horizontal plane and/or a vertical plane,
• the controller configured to cause the support structure to rotate the device under test into different relative positions with respect to the speaker, output the composite signal for each of the different relative positions, and identify the frequency components in the test signals received back from the device under test for the different relative positions.

An audio test system, comprising:

• a controller configured to:
• generate a composite audio signal of multiple different audio signals having different frequencies;
• receive a test signal output from a device under test in response to the composite audio signal and separate out different frequency components corresponding to the different audio signals in the composite audio signal;
• and
• cause a support structure to rotate the device under test into different positions with respect to a speaker, output the composite audio signal for the different positions, and identify the different frequency components in the test signal for the different positions of the device under test.

An apparatus, comprising:

• a speaker configured to output an audio signal, wherein the audio signal comprises multiple different frequencies;
• a structure configured to rotate a device under test into different positions with respect to the speaker;
• and
• a controller configured to:
• control movement of the device under test into the different positions with respect to the speaker,
• receive outputs from the device under test for the different positions, and
• identify directional frequency responses of the device under test for the outputs from the device under test for the multiple different frequencies of the audio signal and for the different positions of the device under test.

A method, comprising:

• outputting an audio signal from a speaker, wherein the audio signal comprises multiple different frequencies;
• moving a device under test into different positions with respect to the speaker;
• and
• identifying directional frequency responses of the device under test for the different frequencies of the audio signal for the different positions of the device under test.