| 摘要 |
PROBLEM TO BE SOLVED: To adjust a heard sound volume without the need for gain adjustment or the like by a hearing aid by varying a level of a magnetic wave signal in the sound listening device where a receiver receives a voice signal transmitted as a radio wave, a loop coil is driven based on the received voice signal, the loop coil generates the magnetic wave signal corresponding to the voice signal so as to relay-transmits the voice signal to the hearing aid provided with a telephone coil and voice information transmitted by a radio wave is heard by the hearing aid set to the telephone coil operating mode. SOLUTION: A receiver 3 is provided to a loop coil 2 worn around the neck. The receiver 3 receives an infrared ray signal (or an FM radio wave) modulated by a voice signal and drives the loop coil 2 based on the received voice signal. The receiver 3 is provided with an output level variable means that varies a level of the magnetic wave signal. The output level variable means varies an output level of the magnetic wave signal and an output level of an earphone 4 corresponding to a turning operation of an output adjustment knob 3 V.
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