Patent ID: 8624602
Filing Date: 2014-01-07
Classification: G01R,G10L

Abstract:
1. A system of measuring an induced frequency modulation effect via a modified Wow and Flutter meter of an audio device, wherein the audio device has an input and an output, wherein two or more audio signals and or a modulated audio signal are coupled to the input of the audio device, wherein the modulated audio signal is provided by way of a carrier signal and a modulating signal, comprising: an input of the modified Wow and Flutter meter, wherein the output of the audio device comprises two or more output audio bandwidth signals or an output modulated audio bandwidth signal is coupled to the input of the Wow and Flutter meter; wherein the modified Wow and Flutter meter includes one or more band pass filters coupled to the input of the Wow and Flutter meter to pass one of the two or more output audio signals to a frequency modulation detector included in the modified Wow and Flutter meter, or wherein the modified Wow and Flutter meter measures the frequency modulation effect from the output modulated audio signal from the output of the audio device; wherein a conventional Wow and Flutter meter receives a single test tone and tests for the frequency modulation effect of the single tone test signal; wherein the induced frequency modulation effect of the one or more audio signals or the modulated audio signal is measured at the output of the device, wherein the frequency modulation effect includes a frequency shift of the one or more output audio bandwidth signals or the modulated audio bandwidth signal; and wherein the frequency modulation effect on one of the input signals is induced by one or more of the other input audio signals or induced by the modulating signal of the modulated audio signal.