H - Electricity
04
R
349/86, 181/9
H04R 1/28 (2006.01) H04R 1/10 (2006.01) H04R 1/22 (2006.01)
Patent
CA 1047943
HEADPHONE ABSTRACT OF THE DISCLOSURE A head phone which, in order to be capable of headphone hearing substantially the same as the so-called stereophonic hearing by means of ordinary loudspeakers, has such sound pressure versus frequency characteristics that there are two peaks between 1.5 and 5 KHz and the level differences between the low level area and the peaks are limited within the range of 6 to 17 dB and which is adapted to lead the sound from a transducer through the outside as well as inside of the headphone to the ears.
244042
Hasegawa Mitsuhiro
Nishimura Yasutake
LandOfFree
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