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Development of Digital-Controlled Measuring Instrument for Hearing
Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
School of Optoelectronic Information, Chongqing University of Technology, Chongqing, China
Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
- 1 Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
- 2 School of Optoelectronic Information, Chongqing University of Technology, Chongqing, China
- 3 Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
- 4 Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
- 5 Laboratory of Forensic Medicine and Biomedical Information, Chongqing Medical University, Chongqing, China
Journal of Signal and Information Processing·Volume 03 (2012)·Pages 421–426·Published 29 November 2012·DOI10.4236/jsip.2012.34055
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Abstract
A digital-controlled measuring instrument for hearing, which is mainly composed of STC11F16EX, AD9833, ISD400416MS and LM1972, is introduced in this paper. It may output highly accurate and purified sine signal whose frequency and amplitude are controlled by digital data. Specially, the displaying number of decibel is equal to actual number of decibel because that frequency response of earphone is corrected through software of microcontroller. Additionally, touching buttons, which is simple and convenience to use, is selected. Hence this instrument is convenient to measure and teach about hearing specially, research and study on frequency characteristic of human ear and impedance characteristic of human body in medical science.
KeywordsSTC11F16EXDigital-ControlledHearingAD9833
- E. Gong, P. Gan, “Medical Physics,” Science Press, Beijing, 2nd Edition, 2004.
- D. W. Kim, H. S. Kim, D. H. Lee, et al., “Importance of Skin Resistance in the Reverse Iontophresis-Based Non-Invasive Glucose Monitoring System,” Proceedings of the 26th annual international Conference of the IEEE Engineering in Medicine and Biology Society, Vol. 4, 2004, pp. 2434-2437.
- STC MCU Limited, “STC11F/10Fxx series MCU & STC11F/ 10Lxx series MCU Data Sheet,” 2012. http://www.mcu-memory.com/datasheet/stc/STC-AD-PDF/STC11F-10Fxx-english.pdf
- Nuvoton Technology Corporation, “ISD4004 SERIES,” 2012. http://www.nuvoton.com/hq/enu/ProductAndSales/ ProductLines/ConsumerElectronicsIC/ ISDVoiceIC/ISDChipCorder/Documents/ISD4004.pdf
- Analog Devices, “Low Power, 12.65 mW, 2.3 V to 5.5 V, Programmable Waveform Generator AD9833,” 2012. http://www.analog.com/static/imported-files/data_sheets/AD9833.pdf
- G. L. Liu, L. Q. Liao and J. P. Shi, “Programmable Wave-Form Generator AD9833 and Its Application,” International Electronic Elements, June 2006, pp. 44-47.
- M. C. Liu, J. R. Sun and J. C. Wu, “Application and Design of Signal Generator Based on DDS Chip,” Journal of Tianjin Normal University, Vol. 28, No. 4, 2008, pp. 66- 68.
- Texas Instruments, “LM1972 μPot? 2-Channel 78 dB Audio Attenuator with Mute,” 2012. http://www.national.com/ds/LM/LM1972.pdf