CA439033A - Microphone testing apparatus - Google Patents

Microphone testing apparatus

Info

Publication number
CA439033A
CA439033A CA439033A CA439033DA CA439033A CA 439033 A CA439033 A CA 439033A CA 439033 A CA439033 A CA 439033A CA 439033D A CA439033D A CA 439033DA CA 439033 A CA439033 A CA 439033A
Authority
CA
Canada
Prior art keywords
testing apparatus
microphone testing
microphone
testing
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA439033A
Other languages
French (fr)
Inventor
John Houlgate Henry
David Rhodes Marks Philip
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUY R FOUNTAIN Ltd
Original Assignee
GUY R FOUNTAIN Ltd
Publication date
Application granted granted Critical
Publication of CA439033A publication Critical patent/CA439033A/en
Expired legal-status Critical Current

Links

CA439033A Microphone testing apparatus Expired CA439033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA439033T

Publications (1)

Publication Number Publication Date
CA439033A true CA439033A (en) 1947-01-07

Family

ID=35554267

Family Applications (1)

Application Number Title Priority Date Filing Date
CA439033A Expired CA439033A (en) Microphone testing apparatus

Country Status (1)

Country Link
CA (1) CA439033A (en)

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