Method and apparatus for in-ear canal sound suppression
First Claim
1. A method of listening to an audio content signal during a full duplex communication event, the method comprising the steps of:
- delivering the audio content signal to an ear canal of a first user by way of an Ear Canal Receiver (ECR) to produce an acoustic audio content;
capturing in the ear canal of the first user by way of an Ear Canal Microphone (ECM) an electronic signal comprising the acoustic audio content and a spoken voice of the first user in a presence of the acoustic audio content;
adaptively filtering the electronic signal using the audio content signal as a reference signal, to suppress the acoustic audio content in the electronic signal while preserving the spoken voice to produce a modified electronic signal;
determining a voice activity level of vowels in the spoken voice of the first user based on the modified electronic signal, the voice activity level indicating a degree of voicing of the vowels in the spoken voice that identifies periodic vibrations of vocal cords by the first user;
adjusting a gain of the audio content signal as a function of a measured background noise level and the voice activity level of the vowels with respect to the measured background noise level to form an adjusted signal, the adjusted signal being provided to the ear canal of the first user via the ECR during the full duplex communication event; and
sending the modified electronic signal to at least one other user so that the acoustic audio content is sufficiently inaudible and simultaneously the spoken voice is audible to the at least one other user during the full duplex communication event.
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Accused Products
Abstract
An earpiece (100) and acoustic management module for in-ear canal suppression control are provided. A method for suppressing signals for a conference call, a vehicle, and a general communication event is also provided. The earpiece can include an Ambient Sound Microphone (111) to capture ambient sound, an Ear Canal Receiver (125) to deliver audio content to an ear canal, an Ear Canal Microphone (123) configured to capture internal sound, and a processor (121). The processor can generate a voice activity level (622) and suppress an echo, spoken voice, and media content in the electronic internal signal, and mix an electronic ambient signal with an electronic internal signal in a ratio dependent on the voice activity level and a background noise level to produce a mixed signal (323) that is delivered to the ear canal (131).
44 Citations
14 Claims
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1. A method of listening to an audio content signal during a full duplex communication event, the method comprising the steps of:
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delivering the audio content signal to an ear canal of a first user by way of an Ear Canal Receiver (ECR) to produce an acoustic audio content; capturing in the ear canal of the first user by way of an Ear Canal Microphone (ECM) an electronic signal comprising the acoustic audio content and a spoken voice of the first user in a presence of the acoustic audio content; adaptively filtering the electronic signal using the audio content signal as a reference signal, to suppress the acoustic audio content in the electronic signal while preserving the spoken voice to produce a modified electronic signal; determining a voice activity level of vowels in the spoken voice of the first user based on the modified electronic signal, the voice activity level indicating a degree of voicing of the vowels in the spoken voice that identifies periodic vibrations of vocal cords by the first user; adjusting a gain of the audio content signal as a function of a measured background noise level and the voice activity level of the vowels with respect to the measured background noise level to form an adjusted signal, the adjusted signal being provided to the ear canal of the first user via the ECR during the full duplex communication event; and sending the modified electronic signal to at least one other user so that the acoustic audio content is sufficiently inaudible and simultaneously the spoken voice is audible to the at least one other user during the full duplex communication event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of listening to audio content comprising the steps of:
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providing the audio content to an ear canal of a first user from a first transducer coupled to a communication device to produce acoustic audio content; engaging in a full duplex voice communication with the communication device where a spoken voice of the first user and the acoustic audio content are captured by a second transducer in the ear canal; adaptively filtering an output signal of the second transducer using the audio content to produce a modified output signal, to suppress the acoustic audio content from a transmitted signal from the communication device such that participants receiving the transmitted signal hear the spoken voice of the first user of the communication device but simultaneously the acoustic audio content is inaudible to the participants receiving the transmitted signal; determining a voice activity level of vowels in the spoken voice of the first user based on the modified output signal, the voice activity level indicating a degree of voicing of the vowels in the spoken voice that identifies periodic vibrations of vocal cords by the first user during a full duplex voice communication event; and adjusting a gain of the audio content as a function of a measured background noise level and the voice activity level of the vowels with respect to the measured background noise level to form an adjusted signal, the adjusted signal being provided to the ear canal via the first transducer during the full duplex voice communication event. - View Dependent Claims (12, 13, 14)
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Specification