作者投稿
专家审稿
编辑办公
Performance Comparison Between B-71 and B-81 Bone Conduction Headphones
-
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。Abstract: 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 2 000 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 4 000 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.
-
Key words:
- bone conduction headphones /
- maximum output intensity /
- harmonic distortion /
- frequency
-
图 1 骨导耳机性能比较测量系统
Figure 1. Measurement system for comparing performance of bone conduction headphones
表 1 相同最大输出下两款耳机谐波失真的比较
Table 1. Comparison of harmonic distortion of two headphones with the same maximum output
频率(Hz) 250 500 1000 2000 4000 最大输出(dB) 40.0 65.0 80.0 85.0 80.0 B-71谐波失真(%) 21.7 9.8 9.0 1.9 0.4 B-81谐波失真(%) 1.5 0.9 1.9 0.4 0.3 
下载: 导出CSV
表 2 相同谐波失真下两款耳机最大输出的比较
Table 2. Comparison of the maximum outputs of the two headphones under the same harmonic distortion
频率(Hz) 250 500 1000 2000 4000 谐波失真(%) 2.5 2.5 2.5 2.5（1.0） 0.3 B-71最大输出(dB) 20.0 53.5 67.0 89.5 80.0 B-81最大输出(dB) 46.5 72.0 82.0 90.0 80.0
下载: 导出CSV
-
[1] 陈炎明, 姚秋平, 时根火, 等. 测听设备纯音听力计检定规程: JJG388-2012[S]. 北京: 中国质检出版社, 2012. [2] 于黎明, 陈洪文. 医用声学计量测试实用技术[M]. 北京: 中国计量出版社, 2006: 27-29. [3] Dirks D, Kamm C. Bone-Vibrator Measurements: Physical Characteristics and Behavioral Thresholds[J]. Journal of Speech Language & Hearing Research, 1975, 18(2): 242. [4] 艾海明, 郭红阳, 王杰. 骨导振子标准制定的研究[J]. 中国听力语言康复科学杂志, 2017, 15(4): 266-268. doi: 10.3969/j.issn.1672-4933.2017.04.006 [5] 孙景阳. 压电式骨传导听觉装置振动器结构设计与试验研究[D]. 长春: 吉林大学, 2010. [6] 王草山. 骨传导技术发展综述[J]. 化学工程与装备, 2016(1): 180-184. [7] Håkansson Bo E V. The balanced electromagnetic separation transducer a new bone conduction transducer.[J]. The Journal of the Acoustical Society of America, 2003, 113(2): 818-825. doi: 10.1121/1.1536633 [8] 韩东一, 翟所强, 韩维举. 临床听力学[M]. 北京: 中国协和医科大学出版社, 2008: 102-149. [9] 全国声学标准化技术委员会. 测听方法第1部分: 纯音气导和骨导测听法: GB/T 16296.1-2018[S]. 北京: 中国标准出版社, 2018. [10] M. C. Gallichan, S. Ravenna, C. Giguère. High-frequency bone conduction audiometry using a piezoelectric transducer[J]. Canadian Acoustics, 1998: 70-71. [11] 全国声学标准化技术委员会. 测听设备第1部分: 纯音听力计: GB/T 7341.1-2010[S]. 北京: 中国标准出版社, 2010. [12] 全国声学标准化技术委员会. 校准测听设备的基准零级第3部分: 骨振器纯音基准等效阈力级: GB/T 4854.3-1998[S]. 北京: 中国标准出版社, 1998. [13] Karl-Johan Fredé, n Jansson, Bo Hå, et al. Electro-acoustic performance of the new bone vibrator Radioear B81: A comparison with the conventional Radioear B71[J]. International Journal of Audiology, 2015, 54(5): 334-340. doi: 10.3109/14992027.2014.980521 -
点击查看大图
图(1) / 表(2)
计量
- 文章访问数: 1333
- HTML全文浏览量: 644
- PDF下载量: 111
- 被引次数: 0
