受話器の實耳レスポンスについて

抄録

In order to get the real ear response reflecting the actual characteristic of a receiver, the relationship among the sound pressures in the free field, at the entrance of a ear canal, ant at the ear drum was found by using the probe tube microphone, with the subject seated facing the sound source in the free field. From the results that the relation between the sound pressure at the entrance of the ear canal ant that at the ear drum was constant in case of both open ear and ear closed by a receiver, the real ear response of a receiver was found to be measured easily. After this experiment, the real ear response of two kinds of receivers were measured. As s results, the conversion coefficient from the conventional coupler response to the real ear response was shown concerning each receiver. By using this conversion coefficient, so far as we use the same kinds of receivers, it is possible to convert directly the real ear response from the coupler response which is easily and accurately obtainable without repeating the complicated measurement of the real ear response.