7. A computer-implemented method comprising: as implemented by a computing device comprising one or more processors configured to execute specific instructions, receiving a first signal comprising data regarding audio content; determining a frequency band within which audio data regarding a user utterance is expected to be present in an input signal; generating an output signal comprising a portion of the first signal, wherein the output signal is generated prior to receiving the input signal, wherein the input signal comprises audio data corresponding to the user utterance and presentation of the output signal, and wherein the output signal excludes a portion of the first signal having a frequency within the frequency band; receiving the input signal, wherein the input signal comprises audio data corresponding to the user utterance and presentation of the output signal, and wherein a portion of the input signal comprising audio data corresponding to the user utterance has a frequency within the frequency band; and providing the input signal to a speech recognizer.
7. A computer-implemented method comprising: as implemented by a computing device comprising one or more processors configured to execute specific instructions, receiving a first signal comprising data regarding audio content; determining a frequency band within which audio data regarding a user utterance is expected to be present in an input signal; generating an output signal comprising a portion of the first signal, wherein the output signal is generated prior to receiving the input signal, wherein the input signal comprises audio data corresponding to the user utterance and presentation of the output signal, and wherein the output signal excludes a portion of the first signal having a frequency within the frequency band; receiving the input signal, wherein the input signal comprises audio data corresponding to the user utterance and presentation of the output signal, and wherein a portion of the input signal comprising audio data corresponding to the user utterance has a frequency within the frequency band; and providing the input signal to a speech recognizer. 8. The computer-implemented method of claim 7 , wherein the portion of the first signal having the frequency within the frequency band is excluded from the output signal using a weighted filter.