Håkansson B, Carlsson P
Department of Applied Electronics, Chalmers University of Technology, Göteborg, Sweden.
Scand Audiol. 1989;18(2):91-8. doi: 10.3109/01050398909070728.
The Bone-Anchored Hearing Aid (BAHA) is a direct bone conduction hearing device which has given patients with various middle ear disorders a significantly improved quality of life. As the BAHA has gained acceptance as a valuable contribution to the Swedish hearing aid rehabilitation program, the need for equipment which can perform objective frequency response measurements has grown. Such equipment is indispensable for carrying out quality assurance, service, and fitting evaluation. To meet the above-mentioned demands, the skull simulator TU-1000 has been developed. The dynamic behaviour of the skull simulator TU-1000 can be characterized as that of a rigid mass body with a weight significantly exceeding the weight corresponding to the dynamic mass of the transducer incorporated in the BAHA. The motions of the mass body are measured by an accelerometer the output signal of which is amplified by a precalibrated amplifier. The output signal is proportional to the output force level from the BAHA. The skull simulator TU-1000 is capable of measuring the output force level from the BAHA with high reliability for frequencies ranging from 100 Hz to 10 kHz.
骨锚式助听器（BAHA）是一种直接骨传导听力设备，它显著改善了患有各种中耳疾病患者的生活质量。随着BAHA作为瑞典助听器康复计划的一项宝贵贡献而被认可，对能够进行客观频率响应测量的设备的需求也在增加。这种设备对于进行质量保证、服务和适配评估来说是必不可少的。为满足上述需求，已开发出头骨模拟器TU - 1000。头骨模拟器TU - 1000的动态特性可表征为一个刚性质量体，其重量显著超过与BAHA中所包含换能器的动态质量相对应的重量。质量体的运动由加速度计测量，其输出信号由预先校准的放大器放大。输出信号与BAHA的输出力水平成正比。头骨模拟器TU - 1000能够在100 Hz至10 kHz的频率范围内高度可靠地测量BAHA的输出力水平。
