DD138378A1 - Schalltrichter fuer eine akustische warnvorrichtung - Google Patents

Schalltrichter fuer eine akustische warnvorrichtung

Info

Publication number
DD138378A1
DD138378A1 DD20723078A DD20723078A DD138378A1 DD 138378 A1 DD138378 A1 DD 138378A1 DD 20723078 A DD20723078 A DD 20723078A DD 20723078 A DD20723078 A DD 20723078A DD 138378 A1 DD138378 A1 DD 138378A1
Authority
DD
German Democratic Republic
Prior art keywords
warning device
sound chamber
acoustic warning
acoustic
sound
Prior art date
Application number
DD20723078A
Other languages
English (en)
Inventor
Manfred Ostertag
Gerd Fuchs
Original Assignee
Manfred Ostertag
Gerd Fuchs
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 Manfred Ostertag, Gerd Fuchs filed Critical Manfred Ostertag
Priority to DD20723078A priority Critical patent/DD138378A1/de
Publication of DD138378A1 publication Critical patent/DD138378A1/de

Links

DD20723078A 1978-08-11 1978-08-11 Schalltrichter fuer eine akustische warnvorrichtung DD138378A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD20723078A DD138378A1 (de) 1978-08-11 1978-08-11 Schalltrichter fuer eine akustische warnvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD20723078A DD138378A1 (de) 1978-08-11 1978-08-11 Schalltrichter fuer eine akustische warnvorrichtung

Publications (1)

Publication Number Publication Date
DD138378A1 true DD138378A1 (de) 1979-10-24

Family

ID=5513976

Family Applications (1)

Application Number Title Priority Date Filing Date
DD20723078A DD138378A1 (de) 1978-08-11 1978-08-11 Schalltrichter fuer eine akustische warnvorrichtung

Country Status (1)

Country Link
DD (1) DD138378A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469921A (en) * 1981-03-17 1984-09-04 Pioneer Electronic Corporation Horn type loudspeaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469921A (en) * 1981-03-17 1984-09-04 Pioneer Electronic Corporation Horn type loudspeaker

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