通过单耳反相提升耳机语音可听度，无需增大音量或降噪。
Binaural Unmasking in Practical Use: Perceived Level of Phase-inverted Speech in Environmental Noise
- 利用单耳信号反相引发双耳掩蔽抑制效应。
- 实验显示语音感知响度最高提升约6分贝，所有测试者均获至少5分贝增益。
- 适合日常嘈杂环境中提升耳机语音清晰度的实用场景。
我们致力于开发一种技术，使耳塞和头戴式耳机中的声音在不增加声压或消除环境噪声的前提下更易听清。为此，聚焦于利用单耳信号反相引发的双耳掩蔽抑制现象。通过模拟实际使用场景，采用不同说话人及日常生活中的噪音（城市环境声、欢呼声）进行实验，验证该现象在真实情境下的效果。日语语音实验结果表明：(i) 在嘈杂环境中，单耳反相使语音感知响度最高提升约6分贝；(ii) 所有测试说话人与噪声组合下均实现至少5分贝的可听度改善。这些发现证明了基于双耳相位差的双耳解掩蔽在实际应用中的有效性。
原文摘要 · Abstract (English)
We aim to develop a technology that makes the sound from earphones and headphones easier to hear without increasing the sound pressure or eliminating ambient noise. To this end, we focus on harnessing the phenomenon of binaural unmasking through phase reversal in one ear. Specifically, we conduct experiments to evaluate the improvement of audibility caused by the phenomenon, using conditions that approximate practical scenarios. We use speech sounds by various speakers and noises that can be encountered in daily life (urban environmental sounds, cheers) to verify the effects of binaural unmasking under conditions close to practical situations. The results of experiments using the Japanese language showed that (i) speech in a noisy environment is perceived to be up to about 6 dB louder with phase reversal in one ear, and (ii) a certain effect (improvement of audibility by 5 dB or more) is obtained for all speakers and noises targeted in this study. These findings demonstrate the effectiveness of binaural unmasking attributed to interaural phase differences in practical scenarios.
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