ACTIVE NOISE CANCELLATION METHOD FOR MOTORCYCLES

• US 20140363009A1
• Filed: 05/08/2014
• Published: 12/11/2014
• Est. Priority Date: 05/08/2013
• Status: Abandoned Application

• Current Assignee: Max Sound Corporation
• Original Assignee: Max Sound Corporation
• Inventors: Trammell, Lloyd
• Application Number:
  US14/273,304
• Publication Number:
  US 20140363009A1
• Time in Patent Office: Days
• US Class Current: 381/71.1
• CPC Class Codes: H04R 2410/05 Noise reduction with a separate noise microphone
• CPC Class Codes: H04R 2410/07 Mechanical or electrical reduction of wind noise generated by wind passing a microphone
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04R 3/005 for combining the signals of two or more microphones specially adapted for hearing aids H04R25/407

Abstract

A Noise Cancellation Process for a motorcycle comprising an input audio source. Input audio source is combined in a mixer. Noise analyzer analyzes output from the mixer for amplitude and harmonic content. A replicate wave that is identical to the input audio source is created. The phase of the replicate wave is changed by −180 degrees. Amplitude from the Noise Analyzer is monitored and amplitude of the replicated wave is matched to the original wave. The phase of the replicate wave and the input audio wave are combined to create Audio Out. Audio Out is played on the system.

Claims

1. A Noise Cancellation Process for a motorcycle comprising:

Input audio source;

Processing the input audio source by a mixer;

Analyzing output from the mixer for amplitude and harmonic content;

Creating a replicate wave that is identical to the input audio source;

Changing the phase of the replicate wave by −

180 degrees;

Monitoring the amplitude amount that is sent from the Noise Analyzer and matching the amplitude of the replicated wave to the original wave;

Combining the phase changed replicate wave with the input audio source to create Audio Out;

Sending Audio Out to be played from the system.

2. The Noise Cancellation Process of claim 1 wherein the input audio source is sound waves from three microphones.

3. The Noise Cancellation process of claim 2 further comprising a fairing.

4. The Noise Cancellation Process of claim 3, wherein the microphones are located in the top areas of the fairing.

5. The Noise Cancellation Process of claim 4, wherein the microphones are of Cardiod type.