Patent ID: 8243953

Claim:
A method for identifying a feedback frequency, the method comprising: determining a magnitude of a first instance of a first dominant spectral component in a first frequency band in a wide-band span of frequencies of a signal; determining a magnitude of a second instance of the first dominant spectral component in a second frequency band having a center frequency corresponding to the largest magnitude in the first frequency band in a mid-band span of frequencies of the signal, the mid-band span of frequencies at least within the wide-band span; determining a magnitude of a third instance of the first dominant spectral component in a third frequency band having a center frequency corresponding to the largest magnitude in the second frequency band in a narrow-band span of frequencies of the signal, the narrow-band span of frequencies at least within the mid-band span; and analyzing the magnitude and frequency of the first, second, and third instances of the first dominant spectral component to determine the presence of feedback characteristics in the signal.