Dynamic Hearing Pty Ltd, Richmond, Victoria, Australia.
Int J Audiol. 2009 Dec;48(12):853-67. doi: 10.3109/14992020903131117.
The effects of four configurations of an environmental noise reduction (ENR) algorithm on preferences, speech understanding, and satisfaction were investigated. The gain reduction at 0 dB modulation depth was either 10 dB in all channels (ENR StrongFlat) or shaped from 2-10 dB across channels according to a speech importance function (ENR MildSII). This gain reduction was either invariant (ENR Constant) or varied with (ENR Variable) the noise level. Ten hearing-impaired participants blindly compared pairs of configurations in real-world situations and recorded their preferences. Sentence reception thresholds (SRTs) were measured in quiet and noise, and satisfaction was rated with speech in noise. Half of the participants preferred ENR MildSII and half preferred ENR StrongFlat. All preferred ENR Variable to ENR Constant. Overall, the preferred ENR configuration was preferred to ENR off in 90% of responses. No statistically significant effect on SRTs was found, but a clinically significant effect of up to 2 dB could not be ruled out from the available data. ENR significantly improved satisfaction for listening comfort, ease of speech understanding, and sound quality.
研究了四种环境降噪（ENR）算法配置对偏好、言语理解和满意度的影响。0 dB 调制深度的增益降低在所有通道中要么为 10 dB（ENR StrongFlat），要么根据言语重要性函数在通道之间从 2-10 dB 变化（ENR MildSII）。这种增益降低要么不变（ENR Constant），要么随噪声水平变化（ENR Variable）。10 名听力受损参与者在真实环境中盲目比较了两种配置，并记录了他们的偏好。在安静和噪声环境中测量了句子接收阈值（SRT），并在噪声中对满意度进行了语音评定。一半的参与者更喜欢 ENR MildSII，另一半更喜欢 ENR StrongFlat。所有人都更喜欢 ENR Variable 而不是 ENR Constant。总体而言，在 90%的情况下，首选的 ENR 配置优于 ENR 关闭。虽然没有发现 SRT 有统计学上的显著影响，但根据现有数据，不能排除高达 2 dB 的临床显著影响。ENR 显著提高了听力舒适度、言语理解的轻松程度和音质的满意度。
