Changes in binaural beat strength to the difference of right and left hearing ability

S. Kim
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Abstract

: The binaural beat is a subjective beating phenomenon due to the frequency difference of sounds heard in both ears, sensed by the human brain. The beating magnitude physically depends on the amplitudes of the two signals with slight different frequencies. Therefore, the binaural beat strength is expected to be affected by the difference in left and right hearing ability. In this study, 34 healthy subjects without hearing loss were chosen. They hear a pure tone sound (450 Hz) at 10 different Sound Pressure Levels (SPLs) (from 50 dB to 27.4 dB) through the one side of ears, while they hear the reference sound (440 Hz, 50 dB) through the other side of ears. Their subjective assessment using a semantic differential method reveals that the binaural beat strength decreases as SPL differences between the two sides of ears increases, if the difference is greater than 2.2 dB. The result suggests that the hearing loss difference between the two sides of ears should be less than 2.2 dB to maximize binaural
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双耳搏动强度随左右听力差异的变化
双耳节拍是一种主观的跳动现象,这是由于两只耳朵听到的声音的频率不同而被大脑感知到的。跳动幅度在物理上取决于两个频率略有不同的信号的幅度。因此,双耳节拍强度预计会受到左右听力能力差异的影响。本研究选择34名无听力损失的健康受试者。他们通过一侧耳朵听到10个不同声压级(从50分贝到27.4分贝)的纯音(450赫兹),而通过另一侧耳朵听到参考声音(440赫兹,50分贝)。他们使用语义差分方法进行主观评估,发现当双耳声压级差异大于2.2 dB时,双耳节拍强度随着双耳声压级差异的增大而减小。结果表明,双耳听力损失差应小于2.2 dB,以最大限度地提高双耳跳动效果。
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来源期刊
CiteScore
0.60
自引率
50.00%
发文量
1
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