Architectural Study of Magnetic-looped-seats in Concert Halls Supporting Hard of Hearing People to hear and to see.

在目前的社会中，包括年轻人，老年人有时会遇到严重的声音识别问题，这是由于与年龄有关的听力损失引起的感官退化。本文研究了在音乐厅为重听人准备的磁环座椅的可用性，通过将助听器连接到舞台纯音，从而避免大厅噪声，并分析了音乐声压的时间分布在演出期间与他们的听力损失水平相比。结果如下。1)带MT功能的助听器是可以接受的，该功能使佩戴者能够通过T（电话线圈）直接听到舞台上的声音和环境声音，包括通过M（麦克风）的掌声。2)重听的人运用他们的想象力，不时地从噪音中合成音乐。3)最好是能清楚看到球员的座位，因为视觉接触对支持听力障碍是必不可少的。但是，用户说，通过T模式助听器在磁环座位的声音比周围的音乐声音小。虽然舞台音乐的声音（在麦克风的磁环）被测量大于环境音乐的声音。然后，通过测量磁路中的磁力，分析了声压的这种恶化。结果如下。1)磁力的衰减取决于与安装在地板上的磁环的距离。2)虽然助听器的推荐高度是离地面1米，但当耳朵坐在1.3米的高度时，声音会下降到-4dB，而地板上的声音会增加到+13dB。3)另外，由于磁环和屏蔽之间的距离很窄，安装在二楼的板，声音下降到-6dB。本研究得出了考虑重听人群的音乐霍尔斯建筑规划的基本要求。

In the present community which includes younger people, aged people sometimes experience serious sound distinction problems due to sensory deterioration caused by age-related hearing loss. This paper investigated the usability of magnetic-looped seats prepared in a concert hall for hard of hearing people by linking their hearing aids to stage pure sounds, thereby avoiding hall noises, and analysed time-distributions of music sound pressures during performances compared with their hearing loss levels. Results were as follows. 1) Hearing aids are acceptable with the MT-function which enables wearest to hear sound directly from the stage through T(telephone coils) and ambient sounds, inclu ding applause through M(microphone). 2)Hard of hearing people use their imaginations by making up music from noises at intervals. 3)Seats from which players are clearly visible are preferable, because visual contact is essential to support the hard of hearing. But, users said that sounds through T mode hearing aids at the magnetic-looped seats were smaller than ambient music sounds. Though the stage music sounds (at the microphone of magnetic-loopes) were measurred bigger than ambiant music sounds. Then, this deterioration of sound pressures were analized, by measuring magnetic forces in the magnetic circuit. Results were as follows. 1) Magnetic forces are declined depend on distances from magnetic-loops installed in floorboads. 2) Although the recommended height of hearing aids is 1m from the floor, however the ears'height when sitting is 1.3m at which sounds declease to -4dB, although sounds on the floor level inclease to +13dB. 3) Further the sounds decleased to -6dB due to the narrow distance between magnetic-loops and shields both installed in the 2nd floor boad. This study obtained basic requirements for architectural planning of concert halls in consideration of hard of hearing people.