| 摘要 |
PROBLEM TO BE SOLVED: To provide a hearing aid, which improves sound characteristics and is especially made satisfactory in the sound characteristics of the tweeter part, by forming a sound discharging port in the shape of the horn which is wide on the outer wall side of the inserting part and narrow on the inner wall side. SOLUTION: At the top end of the inserting part 2 to be inserted into the external auditory miatus of the hearing aid user, a sound path 23 communicated to the side of the shell 1 is opened and on the fore side of this sound path 23, a sound discharging part 20 is provided so as to cover the inserting part 2. Then, a sound discharging port 5 is provided on the front wall surface of this sound discharging part 20 through the thickness of the wall surface, and this sound discharging port 5 is formed in the shape of the horn while using the thickness of wall surface at the sound discharging part 20. Namely, it is generally known the sound characteristics of the megaphone are improved by the action of the horn and the hole of the sound discharging port 5 is formed in the shape of horn (radial) by using the thickness of wall surface at the sound discharging part 20 so that action similar to the megaphone or the like is provided. Therefore, the sound characteristics of the tweeter part are especially improved and tweeter sounds can be easily heard. |
