The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1981
Filed:
Jul. 25, 1979
Applicant:
Inventors:
Klaus Hiemann, Isernhagen, DE;
Jost-Michael Haase, Burgwedel, DE;
Assignee:
Polygram GmbH, Hanover, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01H / ;
U.S. Cl.
CPC ...
73586 ;
Abstract
A device for measuring acoustic reverberation time incorporates a transmission unit and a reception unit combined together into one assembly. Both units share a single series of filters, one of which filters is inserted into a signal path for the transmission unit and for the reception unit. The device serves to measure accurately the acoustic reverberation time of acoustic spaces such as recording rooms, sound studios and the like.