Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1976-08-17
1977-10-18
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181199, H04R 120
Patent
active
040547485
ABSTRACT:
The subject matter of the invention is a directional electro-acoustical converter, primarily a cardioid sound radiator which, in spite of its small dimensions, has cardioid directivity diagram and at the same time wide transmission band.
The known solutions of the cardioid sound radiator have frequency responses falling towards the low frequencies thus being generally suitable for the transmission of speech informations. On the contrary, the directional converter according to the invention provides for a wide transmission band in the loudspeaker operating method being thus suitable for the transmission of musical programs, too. To the membrane of the converter according to the invention at least two phase shifting members having different sound route distances are coupled by means of acoustic coupling elements. The phase shifting members, and their coupling elements, respectively, have such a value that the quarter of the wave length corresponding to the transposition frequency produced by them is at least identical with, but at most the quadruple of the value of the smallest sound route distance. With this solution a nearly straight frequency response within the transmission band, cardioid directivity diagram and various variants thereof, respectively, can be provided for.
REFERENCES:
patent: 3722616 (1973-03-01), Beavers
patent: 3739096 (1973-06-01), Iding
Elektroakusztikai Gyar
Stellar George G.
LandOfFree
Cardioid electro-acoustic radiator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cardioid electro-acoustic radiator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cardioid electro-acoustic radiator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1448135