New Hearing Aid System Relieving Old Age People from Hearing Loss toward the Future Ubiquitous Society

本课题由福井大学大学院工学研究科和医学研究科的研究者们通过校际合作共同完成。各学校从专业的观点出发，共同进行课题的学术活动。随着老年人听力桶的迅速增加，开发操作简单、成本低廉的助听器变得十分重要。听力损失在对数频率轴上具有在较高频率处单调增加的趋势。本计画提出一种余弦型助听器电路，可在对数频率轴上容易地进行翘曲控制（压缩和扩展）频率轴，并通过电路安装和主观测试经验验证，它可以有效地补偿听力损失，本课题还研究了通过输入脑诱发电位信号在短时间内自动控制助听器电路的可能性回到听证会A ...更多信息 id电路，检测信号和输入音之间的相关性，并证明需要大幅提高测量精度。本项目通过主观测试，评估了空气传导和骨传导声音的优选率，并找到了具有一定发生概率的最优选率，从而验证了骨传导的有效性，本项目是在上述助听器基础研究的基础上，研究了助听器电路的数字化，并最终实现了一个全数字化的助听器电路，采用DSP-LSI元件，并利用第一-将全通网络横向连接，实现了对给定听力损失模式的简易助听功能。本课题在真实的环境中验证了听力损失补偿的有效性，提高了听力质量。本课题还提出了通过无线局域网功能直接连接多个助听器使用者，构成网络化助听器系统，以提高老年社会中的通信质量，并设计了基于蓝牙功能的无线局域网助听器系统。此外，还提出了另一种基于无线局域网的助听器系统，以适应未来的泛在社会，通过扩展该思想使用ZigBee元件，并且经验验证，它将传输延迟和功耗降低到基于蓝牙功能的联网助听器系统的十分之一，并且它将适应将系统中助听器用户的数量从蓝牙类型的6个用户扩展系统多达约10，000名用户在ZigBee型系统中申请租用听力损失第一疗养院所需的设备。少

This project was performed by the investigators through interschool collaboration between Graduate School of Engineering and Graduate School of Medical Science of University of Fukui Each school shared the academic activities For the project from the specialty viewpoint.It becomes important due to the prompt increment of old age people with hearing keg to develop easy handling and low cost hearing aids. The hearing loss has a trend of monotonically increasing at higher frequencies on the logarithmic frequency axis. This project proposed a cosine type hearing aid circuit which can be easily controlled on the logarithmic frequency axis by warp (compress and expand) the frequency axis, and empirically verified by circuit installation and subjective test that it could efficiently compensate for the hearing loss, This project also studied the possibility of automatic control of hearing aid circuits in a short fitting time by feeding the cerebral evoked potential signal back to the hearing a … More id circuit, detected the correlation between the signal and input tone and it proved that a drastic improvement of measuring accuracy would be required Regarding the use of bone-conducted sounds, this project evaluated the preferable rate of air-conducted and bone-conducted sounds and found the most preferable rate with some occurrence probability through subjective test so that it verified the effectiveness of bone-conducted sounds and possible application to glass-type miniaturized hearing aid systems.This project is based on the above mentioned fundamental research of hearing aid, studied to digitalize the hearing aid circuits and finally implemented a full-digital hearing aid circuit with a DSP-LSI element and warped the frequency axis by using first-order all pass networks in transversal connection, and realized the easily handled hearing aid function to given hearing loss patterns. It verified the hearing loss compensation with much better quality of hearing in a real environment.This project also proposed the improvement of communications quality in an old age society by directly connecting many hearing aid users via wireless LAN functions to make up a networked hearing aid system, and designed a wireless LAN based hearing aid system using Bluetooth functions. Furthermore, it proposed another wireless LAN based hearing aid system for the future ubiquitous society, using ZigBee elements by extending the idea and empirically verified that it would reduce both transmission delay and power consumption down to the one over tenth of those of Bluetooth function based networked hearing aid system and it would accommodate extend the number of hearing aid users in a system from 6 users in the Bluetooth type system upto about 10,000 users in the ZigBee type system required for the application hire a hearing loss fist nursing home. Less