US 11,908,441 B1Granted

System and method for a speaking chamber with voice cancellation

OwnerKevin Chong Kiminventor

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Abstract

A sound muffling chamber covers a nose and mouth in an airtight manner. The sound muffling chamber includes a microphone that detects vocal sound waves in the sound muffling chamber and generates a voice signal. A digital signal processing system analyzes the voice signal and generates a voice cancellation signal. A sound silencing chamber includes a speaker that generates out of phase sound waves in response to the voice cancellation signal that superimposes on and cancels the vocal sound waves. A sound decelerator is positioned between the sound muffling chamber and the sound silencing chamber and configured to increase a traveling time of the vocal sound waves such that the vocal sound waves' arrival at the sound silencing chamber may be synchronized with the arrival of a voice cancellation signal. The sound muffling chamber may include inflatable cells separated by slats such that the sound muffling chamber is foldable.

Claims19

Dependent claims

A voice cancellation system, comprising:

a sound muffling chamber configured to cover both a nose and mouth of a user, wherein the sound muffling chamber includes soundproof material;
at least one microphone positioned in the sound muffling chamber, wherein the at least one microphone is configured to detect a voice of the user in the sound muffling chamber and generate a voice signal;
a sound silencing chamber, wherein the sound silencing chamber includes at least one speaker;
at least one sound decelerator fluidly coupled between the sound muffling chamber and the sound silencing chamber, wherein the sound decelerator includes material to increase a traveling time of sound waves from the sound muffling chamber to the sound silencing chamber;
a signal processing system configured to analyze the voice signal and generate a digital voice cancellation signal, wherein the voice cancellation signal includes one or more frequency components having a same frequency and amplitude but a 180 degrees out of phase from one or more frequency components of the voice signal;
and
wherein the speaker generates analog sound waves in the sound silencing chamber in response to the digital voice cancellation signal.

4 more elements

A voice cancellation system, comprising:

a sound muffling chamber configured to cover both a nose and mouth of a user, wherein the sound muffling chamber includes soundproof material;
at least one microphone positioned in the sound muffling chamber, wherein the at least one microphone is configured to detect voice sound waves of the user in the sound muffling chamber and generate a voice signal;
a headband coupled to the sound muffling chamber, wherein the headband includes a tubular structure configured to extends circumferentially from the sound muffling chamber over a head of the user;
a sound silencing chamber positioned near an apex of the headband, wherein the sound silencing chamber includes at least one speaker;
at first sound decelerator in a left side of the tubular structure of the headband, wherein the first sound decelerator is fluidly coupled between a left side of the sound muffling chamber and the sound silencing chamber;
a second sound decelerator in a right side of the tubular structure of the headband, wherein the second sound decelerator is fluidly coupled between a right side of the sound muffling chamber and the sound silencing chamber;
a signal processing system configured to analyze the voice signal and generate a voice cancellation signal;
and
wherein the at least one speaker generates analog sound waves in the sound silencing chamber in response to the digital voice cancellation signal.

6 more elements

Dependencies are inferred from the claim text.