Modulation masking in listeners with sensorineural hearing loss.
Modulation masking in listeners with sensorineural hearing loss.
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感音神经性听力损失听众的调制掩蔽。
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
S. Portalier
中科院分区：
文献类型：
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作者：
C. Lorenzi;C. Micheyl;F. Berthommier;S. Portalier
本研究比较了调幅（AM）掩蔽听力正常的听众和听力损失的听众。为了解决这个问题，我们测量了应用于白色噪声载波的正弦AM的检测，作为应用于相同噪声载波的掩蔽正弦AM的频率的函数。这些输入滤波器的模式进行了测量，四个听众听力正常和三个听众中度或轻度至重度感音神经性听力损失。对于所有听力正常的听众和三个听力损失的听众中的两个，以50 dB SL提供刺激。第三个听力损失的听众在25 dB SL下进行测试。对于听力正常的听众，100 Hz信号调制获得的输入滤波器模式具有宽带通特性。所有输入滤波器模式均在100 Hz处显示主掩蔽峰。第二掩蔽峰在50 Hz处也很明显。听力受损者的非掩蔽调制阈值与听力正常者相似。一位中度听力损失的听众表现出广泛调谐的输入滤波器模式，在100 Hz处具有掩蔽峰，但没有次级峰。另外两名中度或轻度至重度感音神经性听力损失的听众在低掩蔽调制频率下没有表现出主掩蔽峰和增加的阈值。这些结果表明，耳蜗损伤可能会影响性能的调制掩蔽任务。
This study compares amplitude-modulation (AM) masking in listeners with normal hearing and in listeners with a hearing loss. To address this issue, we measured the detection of sinusoidal AM applied to a white noise carrier, as a function of the frequency of a masking sinusoidal AM applied to the same noise carrier. These input filter patterns were measured for four listeners with normal hearing and three listeners with moderate or mild-to-severe sensorineural hearing losses. Stimuli were presented at 50 dB SL for all listeners with normal hearing and for two of the three listeners with hearing loss. The third listener with hearing loss was tested at 25 dB SL. For the listeners with normal hearing, the input filter patterns obtained for 100-Hz signal modulation had a broad bandpass characteristic. All input filter patterns showed a primary masking peak at 100 Hz. A secondary masking peak was apparent also at 50 Hz. For the listeners with impaired hearing, the unmasked modulation thresholds were similar to those measured in the listeners with normal hearing. One listener with a moderate hearing loss exhibited a broadly tuned input filter pattern with a masking peak at 100 Hz, but no secondary peak. The two other listeners with moderate or mild-to-severe sensorineural hearing loss showed no main masking peak and increased thresholds at low masker modulation frequencies. These results suggest that cochlear damage may affect performance in a modulation masking task.