Network audio processor
View Patent ↗An audio circuit and associated method for enhanced intelligibility of audio content includes a first means for receiving reproduced audio content, a microphone for providing a microphone output signal in accordance with ambient noise, a second means for enabling the microphone output signal when the reproduced audio content is off, and disabling the microphone output signal when the reproduced audio content is on, and a signal processor, in communication with the first and second means. The signal processor applies a transfer function to the reproduced audio content for increasing gain to the reproduced audio content as a function of increasing amplitude of the microphone output signal, and decreasing gain to the reproduced audio content signal as a function of decreasing amplitude of the microphone output signal, and applies an equalization curve to the audio content to boost frequencies in a range that enhances consonant perception thus increasing speech intelligibility.
1. A network audio processing circuit, comprising:
a means for receiving a reproduced audio content signal;
a microphone for providing a microphone output signal in accordance with ambient noise;
a means for enabling the microphone output signal during first increments of time when the reproduced audio content signal is substantially off, and disabling the microphone output signal during second increments of time when the reproduced audio content signal is on;
a signal processor, in communication with the means for receiving a reproduced audio content signal and the means for enabling and disabling the microphone output signal for:
applying a transfer function to the reproduced audio content signal, the transfer function incrementally increasing gain adjustments to the reproduced audio content signal as a function of an increasing amplitude of the microphone output signal, and incrementally decreasing gain adjustments to the reproduced audio content signal as a function of a decreasing amplitude of the microphone output signal; and
applying an equalization curve to the audio content signal to boost frequencies in a vocal range that enhance consonant perception thus increasing speech intelligibility;
a means for enabling the network audio processing circuit to identify itself on the network; and
at least one amplifier having an input coupled to an output signal of the signal processor and an output coupled to an input of a speaker, wherein the signal processor communicates with the at least one amplifier to determine whether or not a respective speaker is connected to the audio processing circuit and if a connected speaker is operational.
2. The network audio processing circuit of claim 1 , wherein said signal processor further applies a delay to the audio content signal.
3. The network audio processing circuit of claim 2 , wherein said delayed audio content signal is perceived to be emanating from a content playout device associated with said audio content signal instead of from a speaker on which said audio processing circuit is integrated.
4. The network audio processing circuit of claim 1 , wherein the means for enabling the network audio processing circuit to identify itself on the network is further configured to enable a reset of the network audio processing circuit.
5. The network audio processing circuit of claim 1 , wherein the means for enabling the network audio processing circuit to identify itself on the network is further configured to enable a self test of the network audio processing circuit.
6. A method of enhanced intelligibility of a reproduced audio content signal in the presence of ambient noise, comprising the steps of:
receiving the reproduced audio content signal;
monitoring ambient noise signals using a microphone to provide a microphone output signal;
enabling the microphone output signal during first increments of time when the reproduced audio content signal is substantially off, and disabling the microphone output signal during second increments of time when the reproduced audio content signal is on, such that the microphone output signal includes ambient noise signal components without including reproduced content signal components;
applying a first transfer function to the reproduced audio content signal, the first transfer function incrementally increasing gain adjustments to the reproduced audio content signal as a function of an increasing amplitude of the microphone output signal, and incrementally decreasing gain adjustments to the reproduced audio content signal as a function of a decreasing amplitude of the microphone output signal;
applying an equalization curve to the audio content signal to boost frequencies in a vocal range that enhance consonant perception thus increasing speech intelligibility;
initiating a query via a processor connected to an input of an amplifier whose output is connected to a speaker to determine whether or not a respective speaker is connected and if a connected speaker is operational; and
enabling the network audio processing circuit to identify itself on the network.
7. The method of claim 6 , wherein the incremental gain adjustments are in steps of between about 1 dB and about 10 dB.
8. The method of claim 6 , comprising applying a delay to the audio content signal.
9. The method of claim 6 , wherein said enabling the network audio processing circuit to identify itself on the network further comprises enabling the conducting of a self test of the network audio processing circuit.
10. The method of claim 6 , wherein said enabling the network audio processing circuit to identify itself on the network further comprises enabling a reset of the network audio processing circuit.