In a balancing test, ten normal-hearing listeners adjusted filtered speech-shaped babble-noise to equally loud levels. On average, they selected about 10 dB less gain for bands below 1 kHz than for bands above and including 1 kHz. The findings applied to two bandwidths (octave and equivalent rectangular bandwidth) and two levels (65 and 85 dB SPL). The outcome suggests that hearing aid fitting procedures aiming to equalize loudness of speech bands should prescribe less low-frequency gain than procedures aiming to normalize loudness of speech bands. A significant interaction was found between bandwidth and input level for the high-frequency bands.
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机译：在一项平衡测试中，十名听力正常的听众将过滤后的语音形ba嗒声调整到同样大声的水平。平均而言，他们选择低于1 kHz的频段的增益要比高于并包含1 kHz的频段的增益低大约10 dB。研究结果适用于两个带宽（八度和等效矩形带宽）和两个级别（65和85 dB SPL）。结果表明，旨在均衡语音带响度的助听器拟合程序应规定比旨在规范语音带响度的程序更少的低频增益。在高频频段的带宽和输入电平之间发现了显着的相互作用。
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