Methods and systems for active sound attenuation in an air handling unit
AssigneeHuntair, Inc.
InventorLAWRENCE G. HOPKINS
Life of this patent
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Abstract
A system and method for controlling noise produced by an air handling system is provided. The system includes a source microphone to collect sound measurements from the air handling system and a processor to define a cancellation signal that at least partially cancels out the sound measurements. The system also includes a speaker to generate the cancellation signal. The sound measurements are at least partially canceled out within a region of cancellation. Accordingly, the system further includes a response microphone to collect response sound measurements at the region of cancellation. The processor tunes the cancellation signal based on the response sound measurements.
Claims49
A method for controlling noise produced by an air handling system, comprising:
- collecting sound measurements from the air handling system, the sound measurements being defined by acoustic parameters,
- determining values for the acoustic parameters based on the sound measurements collected;
- calculating offset values for the acoustic parameters, the offset values defining a cancellation signal that at least partially cancels out the sound measurements;
- and
- generating the cancellation signal based on the offset values.
A system for controlling noise produced by an air handling system, comprising:
- a source microphone to collect sound measurements from the air handling system;
- a module to define a cancellation signal that at least partially cancels out the sound measurements;
- and
- a speaker to generate the cancellation signal.
A fan unit for an air handling system, comprising:
- a source microphone to collect sound measurements from the fan unit;
- a module to define a cancellation signal that at least partially cancels out the sound measurements;
- and
- a speaker to generate the cancellation signal.
Dependencies are inferred from the claim text.