Personal computer based audio frequency impedance analyzer

An apparatus for analyzing the response of a device under test using a signal generated by an audio card, comprising:

• a first means for receiving a first signal from the audio card;
• a first means for transmitting the first signal to a device under test;
• a second means for receiving a second signal from the device under test;
• a second means for transmitting the second signal to the audio card;
• a third means for transmitting the first signal to a short circuit;
• a third means for receiving the second signal from the short circuit;
• a fourth means for transmitting the first signal to an open circuit;
• and
• a fourth means for receiving the second signal from the open circuit.

A method for analyzing the response of a device under test using a signal generated by an audio card, comprising:

• generating a first sound file;
• generating a first signal with the audio card where the first signal corresponds to the first sound file;
• transmitting the first signal to the device under test through a Z box;
• receiving a second signal from the device under test;
• and
• transmitting the second signal through the Z box to the audio card, wherein the audio card converts and records the second signal as a second sound file.