Active noise control in a duct with highly turbulent airflow

Details Active noise control in a duct with highly turbulent airflow Active noise control in a duct with highly turbulent airflow

1994-09-29

1997-02-25

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116

Patent

active

056066228

ABSTRACT:
A system for providing active noise control for turbulent airflow in a duct utilizing flow straightening upstream of bullet shaped microphones coupled to the noise control electronics thereby improving noise coherence between the input and error microphones and achieving noise reduction.

REFERENCES:
patent: 3936606 (1976-02-01), Wanke
patent: 4044203 (1977-08-01), Swinbanks
patent: 4122674 (1978-10-01), Andersson et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 5215454 (1993-06-01), Ferramola et al.
patent: 5339287 (1994-08-01), Bauer

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