价格：面议
0
联系人：
电话：
地址：
产品规格：可调节静电电流：2N to 8N，频响测试范围：50 Hz to 10 KHz
产品数量：100 个
包装说明：套件
关 键 词：4930型人工乳突用于听力测定中的骨传导助听器和骨振器的校准。
发布时间：2015-01-20
4930型人工乳突 ? 4930型人工乳突用于听力测定中的骨传导助听器和骨振器的校准。 它由机械… 用途 ? Objective measurement of hearing aid and audiometer bone vibrator parameters ? Frequency response and output determination of bone vibrators ? 骨振器的测量频响输出 ? Design and production testing and calibration of vibrators ? 振动器的设计研发及校准测量。 特点 ? Stable, reproducible simulation of the mechanical characteristics of the human head ? Built-in force transducer with high-stability characteristic ? Calibrator provides for checking and calibration of all parameters ? Adjustable static force from 2N to 8N ? 50 Hz to 10 kHz frequency range ? Conforms to IEC 60373 (1990), BS 4009 (1991), ANSI 3.13 (1987) and ANSI S3.26 (1981) All the components of the Artificial Mastoid have been selected to ensure both excellent long-term stability and accurate correspondence with the mechanical characteristics of the human mastoid. It is designed in accordance with the International Electrotechnical Commission publication IECR 60373 (1990) including revision, and meets the requirements of the British Standard BS 4009 (1991) and American National Standard ANSI S 3.13-1987 and S3.26-1981. The Artificial Mastoid consists of an inertial mass, simulating the human head, mounted on a base-plate by resilient plastic spacers which surround the securing-bolts. The baseplate is carried on a suspension composed of three conical springs filled with foam rubber to provide damping. The natural frequencies of this suspension, which isolates the whole apparatus from external disturbances such as someone bumping the table during use, are all below 5Hz, which is one-tenth of the low-frequency limit of the working range. The base-plate also carries a loading- arm and its associated supports. The function of this is to maintain the device to be calibrated reliably in position, pressing against the calibration surface of the Artificial Mastoid with a static force which can be adjusted between 2 and 8N. A spring balance and level indicator are included to facilitate this adjustment. Rubber retaining-bands ensure virtually massless rear support for the device under calibration.
