B-71和B-81骨导耳机的性能比较  

Performance Comparison Between B-71 and B-81 Bone Conduction Headphones

作　　者：赵正宜[1] 钟波[1] 何龙标[1] 冀飞[2] 林颖 田锋[1] ZHAO Zhengyi;ZHONG Bo;HE Longbiao;JI Fei;LIN Ying;TIAN Feng(National Institute of Metrology,Beijing 100029,China;College of Otolaryngology'Head and Neck Surgery,Chinese PLA General Hospital,Beijing 100853,China;The First Affiliated Hospital of Air Force Military University of PLA,Xi'an 710032,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]解放军总医院耳鼻咽喉头颈外科医学部,北京100853 [3]空军军医大学第一附属医院,西安710032

出　　处：《计量科学与技术》2021年第11期11-13,28,共4页Metrology Science and Technology

摘　　要：为探索新型骨导耳机在临床听力测试中的优势和潜在应用价值,设计了一套骨导耳机声学参数测量系统,选取5个测听频率,比较了B-71和B-81两种常用骨导耳机的最大输出强度和谐波失真指标。在最大输出强度相同时,250~2000 Hz的4个频率点上B-81耳机谐波失真明显小于B-71;在4000 Hz,B-71和B-81耳机谐波失真无明显差异。B-81耳机在最大输出强度和谐波失真两方面均优于B-71耳机,尤其是在低频和中频段。测试结果表明在听力学相关测试中可以采用B-81替代B-71。A measurement system for bone conduction headphone acoustic parameters was designed to explore the advantages and potential applications of new bone conduction headphones in audiology tests.The maximum output intensity and harmonic distortion of two commonly used bone conduction headphones,i.e.B-71 and B-81,were compared at five listening frequencies.At the same maximum output intensity,the harmonic distortion of B-81 headphones at four frequencies in the range 250 Hz to 2000 Hz was significantly lower than that of B-71,and no significant difference in the harmonic distortion of B-71 and B-81 headphones was observed at 4000 Hz.B-81 headphones were better than B-71 headphones in terms of both the maximum output intensity and the harmonic distortion,especially in the low and middle frequency bands.The test results show that B-81 can be used instead of B-71 in audiology-related tests.

关 键 词：骨导耳机 最大输出强度 谐波失真 频率 

分 类 号：TH785.1[机械工程—仪器科学与技术]