by using a single transducer with sound reflecting, diffracting, directing or guiding means

Full Title

Details of transducers, > Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purpose H04R5/00) > for obtaining desired directional characteristic only > by using a single transducer with sound reflecting, diffracting, directing or guiding means

Child Classifications

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• H04R 1/342
• H04R 1/345
• H04R 1/36 by using a single aperture of dimensions not greater than the shortest operating wavelength
• H04R 1/38 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone