Characterization of external ear impulse responses using Golay codes.
Characterization of external ear impulse responses using Golay codes.
复制标题
使用格雷码表征外耳脉冲响应。
DOI：
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发表时间：
1992
影响因子：
2.4
通讯作者：
J. C. Middlebrooks
中科院分区：
文献类型：
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作者：
Bin Zhou;David M. Green;J. C. Middlebrooks
这份报告解释了使用一个互补的系列，Golay码，探测外耳的脉冲响应。该代码被用来测量两个共振的人耳道，使用密封的声音传递系统，并测量耳廓的传递函数，使用自由场源。对于两个512二进制数的序列，信噪比在单个脉冲上的改善接近30.1 dB [10 log（2.512）]的理论值。这种技术有许多与最大长度序列相同的性质[M. R. Schroeder，J. Acoust. Soc. Am. 66，497-500（1979）]，但是它具有附加的优点，即序列长度是2的整数幂，因此特别便于与现代傅立叶变换技术一起使用。
This report explains the use of a complementary series, Golay codes, for probing the impulse response of the external ear. The codes are used to measure both the resonance of the human ear canal, using a sealed sound-delivery system, and to measure the transfer function of the pinna, using a free-field source. With two series of 512 binary numbers, the improvement in signal-to-noise ratio over a single impulse approaches the theoretical value of 30.1 dB [10 log(2.512)]. This technique has many of the same properties as maximal-length sequences [M. R. Schroeder, J. Acoust. Soc. Am. 66, 497-500 (1979)], but it has the added advantage that the sequence length is an integer power of two and is, therefore, particularly convenient to use with modern Fourier transform techniques.