Beam pattern characteristics of directional microphone and features of gain changes in cochlear implant(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2018年第12期
- Page:
- 1468-1472
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- Beam pattern characteristics of directional microphone and features of gain changes in cochlear implant
- Author(s):
- CHEN Yousheng; ZHANG Chunxiao; LIN Weizhen; YAN Guiling; LIN Chongbo; LI Guoyu; YE Weijian; MA Lidong
- Shenzhen Institute of Information Technology, Shenzhen 518000, China
- Keywords:
- ; Keywords: cochlear implant; directional microphone; beam pattern; gain
- PACS:
- R318；TH776
- DOI:
- DOI:10.3969/j.issn.1005-202X.2018.12.019
- Abstract:
- Abstract: Omni-directional microphone is traditionally applied in the outside part of cochlear implant for signal acquisition. Directional microphone and the microphone array-based speech enhancement algorithm are gradually applied in recent researches and industries. Herein the features of signal acquisition, beamforming and gain change are analyzed based on the size parameters and signal transmission modes of actual directional microphone. Moreover, the characteristics of system response curve with positive gain changes and negative gain changes are researched, and the effects of gain change on high-frequency signals and low-frequency signals are investigated, which helps the further application of directional microphone and the research of speech enhancement in the front-end of cochlear implant.
Last Update: 2018-12-26