Active acoustic filter with automatic selection of filter parameters based on ambient sound
First Claim
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1. An active acoustic filter system, comprising:
- a microphone, a preamplifier, and an analog to digital converter to convert ambient sound experienced by the active acoustic filter system into digitized ambient sound;
a memory storing one or more stored sound profiles and a respective set of processing parameters associated with each of the one or more stored sound profiles;
a processor coupled to the memory and configured to;
analyze the digitized ambient sound to create an ambient sound profile,determine whether or not the ambient sound profile matches one of the one or more stored sound profiles,when the ambient sound profile matches one of the one or more stored sound profiles;
retrieve the set of processing parameters associated with the stored sound profile that matches the ambient sound profile, andgenerate digitized processed sound by processing the digitized ambient sound in accordance with the set of processing parameters retrieved from the memory, andwhen the ambient sound profile does not match one of the one or more stored sound profiles;
generate digitized processed sound by processing the digitized ambient sound in accordance with processing parameters set by a user that indicate a listening preference of the ambient sound experienced by the active acoustic filter system, wherein the listening preference at least includes suppressing a decibel level of a first frequency range of the digitized ambient sound with respect to a decibel level of a second frequency range of the digitized ambient sound, andstore, in the memory, the ambient sound profile in association with the processing parameters set by the user; and
a digital to analog converter, an amplifier, and a speaker to convert the digitized processed sound output from the processor into processed output sound, wherein the processed output sound is a modified version of the ambient sound experienced by the active acoustic system that reflects the user'"'"'s listening preference of the ambient sound experienced by the active acoustic filter system when the ambient sound profile does not match one of the one or more stored sound profiles.
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Abstract
Active acoustic filter systems and methods are disclosed. An active acoustic filter system includes a memory storing one or more stored sound profiles and a respective set of processing parameters associated with each of the one or more stored sound profiles. A processor coupled to the memory generates processed sound by processing ambient sound in accordance with a set of processing parameters retrieved from the memory based on results from comparing an ambient sound profile to at least one of the one or more stored sound profiles.
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Citations
19 Claims
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1. An active acoustic filter system, comprising:
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a microphone, a preamplifier, and an analog to digital converter to convert ambient sound experienced by the active acoustic filter system into digitized ambient sound; a memory storing one or more stored sound profiles and a respective set of processing parameters associated with each of the one or more stored sound profiles; a processor coupled to the memory and configured to; analyze the digitized ambient sound to create an ambient sound profile, determine whether or not the ambient sound profile matches one of the one or more stored sound profiles, when the ambient sound profile matches one of the one or more stored sound profiles; retrieve the set of processing parameters associated with the stored sound profile that matches the ambient sound profile, and generate digitized processed sound by processing the digitized ambient sound in accordance with the set of processing parameters retrieved from the memory, and when the ambient sound profile does not match one of the one or more stored sound profiles; generate digitized processed sound by processing the digitized ambient sound in accordance with processing parameters set by a user that indicate a listening preference of the ambient sound experienced by the active acoustic filter system, wherein the listening preference at least includes suppressing a decibel level of a first frequency range of the digitized ambient sound with respect to a decibel level of a second frequency range of the digitized ambient sound, and store, in the memory, the ambient sound profile in association with the processing parameters set by the user; and a digital to analog converter, an amplifier, and a speaker to convert the digitized processed sound output from the processor into processed output sound, wherein the processed output sound is a modified version of the ambient sound experienced by the active acoustic system that reflects the user'"'"'s listening preference of the ambient sound experienced by the active acoustic filter system when the ambient sound profile does not match one of the one or more stored sound profiles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for processing digitized ambient sound to provide digitized processed sound, comprising:
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receiving, at a microphone of an active acoustic filter system, ambient sound experienced by the active acoustic filter system, wherein the ambient sound is provided to a preamplifier; converting by an analog to digital converter amplified ambient sound provided by the preamplifier into digitized ambient sound; storing, in a memory, one or more stored sound profiles and a respective set of processing parameters associated with each of the one or more stored sound profiles; analyzing the digitized ambient sound to create an ambient sound profile; determining whether or not the ambient sound profile matches one of the one or more stored sound profiles; when the ambient sound profile matches one of the one or more stored sound profiles; retrieving the set of processing parameters associated with the stored sound profile that matches the ambient sound profile, and generating, by a processor, the digitized processed sound by processing the digitized ambient sound in accordance with the set of processing parameters retrieved from the memory; and when the ambient sound profile does not match one of the one or more stored sound profiles; generating, by the processor, the digitized processed sound by processing the digitized ambient sound in accordance with processing parameters set by a user that indicate a listening preference of the ambient sound experienced by the active acoustic filter system, wherein the listening preference at least includes suppressing a decibel level of a first frequency range of the digitized ambient sound with respect to a decibel level of a second frequency range of the digitized ambient sound, and storing, in the memory, the ambient sound profile in association with the processing parameters set by the user; and outputting processed output sound, wherein the processor outputs the digitized processed sound to a digital to analog converter, the digital to analog converter outputting an analog processed sound to a speaker, wherein the speaker outputs the processed output sound based on the analog processed sound, wherein the processed output sound outputted by the speaker is a modified version of the ambient sound experienced by the active acoustic system that reflects the user'"'"'s listening preference of the ambient sound experienced by the active acoustic filter system when the ambient sound profile does not match one of the one or more stored sound profiles. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification