Sound filtering system

• US 9,913,029 B2
• Filed: 05/18/2016
• Issued: 03/06/2018
• Est. Priority Date: 08/10/2015
• Status: Active Grant

• Current Assignee: Haebora Co., Ltd.
• Original Assignee: Haebora Co., Ltd.
• Inventors: Shin, Doo Sik
• Primary Examiner(s): Lao, Lun-See
• Application Number:
  US15/308,607
• Publication Number:
  US 20170188142A1
• Time in Patent Office: 657 Days
• Field of Search: 381 74, 381 711- 716, 381151, 381 941- 944, 381 1- 3
• CPC Class Codes: H04R 1/1083 Reduction of ambient noise active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06
• CPC Class Codes: H04R 2201/107 Monophonic and stereophonic headphones with microphone for two-way hands free communication
• CPC Class Codes: H04R 2410/01 Noise reduction using microphones having different directional characteristics
• CPC Class Codes: H04R 2410/05 Noise reduction with a separate noise microphone
• CPC Class Codes: H04R 2460/13 Hearing devices using bone conduction transducers
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407
• CPC Class Codes: H04R 3/04 for correcting frequency response

Abstract

Provided is an earset. The earset includes an internal microphone provided inside an earphone worn on a user'"'"'s ear, and configured to receive a first sound transferred from the user'"'"'s mouth through an external auditory meatus via an Eustachian tube and convert the first sound into a first sound signal, at least one external microphone provided outside the earphone, and configured to receive a second sound provided from the user'"'"'s mouth and convert the second sound into a second sound signal, and a controller configured to filter a noise of the second sound signal based on the first sound signal, remove the noise, and generate a third sound signal.

Claims

1. A sound filtering system comprising:

an internal microphone provided inside an earphone worn on a user'"'"'s ear, and configured to receive a first sound transferred from the user'"'"'s mouth through an external auditory meatus via an Eustachian tube and convert the first sound into a first sound signal;

at least one external microphone provided outside the earphone, and configured to receive a second sound provided from the user'"'"'s mouth and convert the second sound into a second sound signal; and

a controller configured to filter a noise of the second sound signal based on the first sound signal, remove the noise, and generate a third sound signal,

wherein the first sound signal and the second sound signal have the same phase,

wherein the controller includes a filter,

wherein the filter determines whether a waveform of the second sound signal is abnormal based on a waveform of the first sound signal,

wherein when the filter is determined an abnormal waveform is generated in the second sound signal, the filter generates a waveform opposite the abnormal waveform of the second sound signal to offset to the abnormal waveform of the second sound signal, and thus removes the noise of the second sound signal.

2. The system of claim 1, wherein the controller is provided in an earset including the internal microphone and the at least one external microphone, or in an external device.

3. The system of claim 1, further comprising an output adjuster configured to adjust an output of the third sound signal.

4. The system of claim 1, wherein the earphone includes a speaker configured to output a sound signal provided from the external device as a sound and provide the sound to the external auditory meatus of the user.