Rosen S, Baker R J
Department of Phonetics and Linguistics, University College, London, UK.
Audiology. 1994 Jan-Feb;33(1):37-46. doi: 10.3109/00206099409072953.
The possible influence of the acoustic reflex in auditory filter shape measurements was investigated in 4 normal listeners by measuring contralateral acoustic reflexes to stimuli used in the notched-noise method. For probe/masker combinations centred at 125 and 250 Hz, the reflex was, at most, barely detectable even at masker levels of 80 dB SPL/Hz. On the other hand, all listeners had a measurable reflex at a masker level of 70 dB SPL/Hz for a probe/masker combination centred at 1 kHz. Some listeners also evidenced reflexes at a masker level of 60 kB SPL/Hz at this frequency and at 70 dB SPL/Hz at 500 Hz. As it is known that the acoustic reflex significantly attenuates frequency components of sounds below about 2 kHz as they pass through the middle ear, it appears that estimates of auditory filter bandwidths at high levels at 0.5 and 1 kHz can be influenced to some degree by the reflex.
通过测量对用于陷波噪声法的刺激的对侧听觉反射，研究了4名正常听力受试者听觉反射对听觉滤波器形状测量的可能影响。对于中心频率为125和250Hz的探测音/掩蔽音组合，即使在80dB SPL/Hz的掩蔽音强度下，反射最多也只是勉强可检测到。另一方面，对于中心频率为1kHz的探测音/掩蔽音组合，所有受试者在70dB SPL/Hz的掩蔽音强度下都有可测量的反射。一些受试者在该频率60dB SPL/Hz的掩蔽音强度下以及在500Hz 70dB SPL/Hz的掩蔽音强度下也表现出反射。由于众所周知，听觉反射会在声音低于约2kHz的频率成分通过中耳时显著衰减，因此看来在0.5和1kHz的高强度下听觉滤波器带宽的估计可能会在一定程度上受到反射的影响。
