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

在目前包括年轻人在内的社会中，老年人有时会因与年龄有关的听力丧失而引起的感觉退化而经历严重的声音区分问题。本文研究了在音乐厅为重听人群准备的磁环座椅的可用性，通过将他们的助听器连接到舞台纯声音，从而避免了大厅噪音，并分析了表演期间音乐声压的时间分布与听力损失水平的比较。结果如下：1)有mt功能的助听器是可以接受的，佩戴者可以通过T（电话线圈）直接听到舞台上的声音，也可以通过M（麦克风）听到掌声等周围环境的声音。失聪的人利用他们的想象力，每隔一段时间就把噪音编成音乐。3)能清晰看到球员的座位是最好的，因为视觉接触对于支持听力障碍是必不可少的。但是，用户表示，通过磁环座椅上的T模式助听器发出的声音比环境音乐的声音要小。虽然舞台音乐的声音（在磁环麦克风上）比环境音乐的声音要大。然后，通过测量磁路中的磁力，分析了这种声压的恶化。结果如下：1)磁力的下降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板1米，但是当坐着时耳朵的高度是1.3米，声音下降到-4dB，虽然地板上的声音增加到+13dB。3)此外，由于安装在2楼板上的磁环和屏蔽之间的距离很窄，声音下降到-6dB。本研究获得了考虑重听人群的音乐厅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.