ZA771689B - Improvements in and relating to active sound attenuation - Google Patents

Improvements in and relating to active sound attenuation

Info

Publication number
ZA771689B
ZA771689B ZA00771689A ZA771689A ZA771689B ZA 771689 B ZA771689 B ZA 771689B ZA 00771689 A ZA00771689 A ZA 00771689A ZA 771689 A ZA771689 A ZA 771689A ZA 771689 B ZA771689 B ZA 771689B
Authority
ZA
South Africa
Prior art keywords
relating
sound attenuation
active sound
active
attenuation
Prior art date
Application number
ZA00771689A
Inventor
R Smith
G Chaplin
Original Assignee
Sound Attenuators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sound Attenuators Ltd filed Critical Sound Attenuators Ltd
Priority to ZA00771689A priority Critical patent/ZA771689B/en
Publication of ZA771689B publication Critical patent/ZA771689B/en

Links

ZA00771689A 1977-03-21 1977-03-21 Improvements in and relating to active sound attenuation ZA771689B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA00771689A ZA771689B (en) 1977-03-21 1977-03-21 Improvements in and relating to active sound attenuation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA00771689A ZA771689B (en) 1977-03-21 1977-03-21 Improvements in and relating to active sound attenuation

Publications (1)

Publication Number Publication Date
ZA771689B true ZA771689B (en) 1978-02-22

Family

ID=25571387

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00771689A ZA771689B (en) 1977-03-21 1977-03-21 Improvements in and relating to active sound attenuation

Country Status (1)

Country Link
ZA (1) ZA771689B (en)

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