BONE CONDUCTION TELEPHONE

摘要

a speech circuit(1) having a switching function, an emergency informing function and a dialing function; a tone quality selection circuit(2) selecting the tone quality according to the auditory characteristic of the user; a tone quality adjusting circuit(3) with a semiconductor chip having the tone quality adjusting function to adjust the output signal tone quality of the speech circuit(1); an amplifying circuit(4) amplifying the tone quality of voice signal; and a bone handset(5) connected to the amplifying circuit(4).