Influence caused by placement of a bone-conducted vibrator on sound transmission
* Presenting author
Bone conduction (BC) is another way of sound transmission for our hearing perception besides air conduction. It conducts sound through skin and skull, bypassing part of the ear canal. The position where the vibrator is put on one’s head makes a difference in BC transmission. Although standards of bone conduction were established on the position of the mastoid (the prominence of the skull behind the ear), nowadays manufacturers favor bone- conducted headphone whose vibrator is put on the position of the condyle (the articular process of the ramus of the mandible bone, in front of the ear). However, there are not enough data in details for the condyle. In this research, hearing thresholds and ear-canal sound pressure of bone conduction on the condyle and the mastoid were measured, and a comparison between them was made to investigate the difference of BC transmission between the two positions, followed by a discussion on the influence of placement on bone conduction.