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METHOD AND APPARATUS FOR OBJECTIVE ASSESSMENT OF IN-EAR DEVICE ACOUSTICAL PERFORMANCE
专利权人:
3M INNOVATIVE PROPERTIES COMPANY
发明人:
Jeremie Voix,Frederic Laville
申请号:
US16797228
公开号:
US20200196078A1
申请日:
2020.02.21
申请国别(地区):
US
年份:
2020
代理人:
摘要:
A method and apparatus for objectively assessing acoustical performance of an in-ear device having a passageway extending there through use a dual microphone probe that removably engages the passageway. The acoustical performance of the in-ear device is performed with the in-ear device inserted into the ear canal of the user and a reference sound source. A clip holding the probe in an acoustic near field of the sound source permits real time calibration thereof. The method and apparatus allow on-site and in-situ measurement of a predicted personal attenuation rating of the device, a subject-fit re-insertion test, an acoustic seal test, a rating test, a stability and reliability test, as well as a protection test of the device with an assessment of a filtered predicted exposure level at the ear for a specific noise exposure level. The apparatus may be simply housed along with the sound source for in-field evaluation tests.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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