HEADPHONE WITH FUNCTION OF EXPRESSING ONE'S MIND, AND DENTAL CHAIR SET

PROBLEM TO BE SOLVED: To provide a headphone with a function of expressing one's mind since a normal headphone is used by attaching it to existing audio equipment only for listening, with hardness for patients to express their minds during a dental treatment. SOLUTION: When the patient presses a push button 7a, a voice synthesizer 8 generates voice signals that sound "it hurts, it hurts" and produces the sounds from a speaker 3. In the same way, when the patient presses a push button 7b, the speaker 3 produces the sound that sound "it hurts, it hurts very much". When the patient shifts a switch 7c sideways, a microphone 4 and an ear set 5 are connected to transmit voices of a dentist through the microphone 4 and the ear set 5. When a push-button switch 7 is not used, signals of a sound reproducing system 2 are sent to the ear set 5 through a line 6 so that the patient listens to music. COPYRIGHT: (C)2009,JPO&INPIT