基于听觉诱发电位的不同声压级刺激下人体声感觉研究

Study on Human Acoustic Sensation under Different Sound Pressure Levels Based on Brainstem Auditory Evoked Potentials

声环境作为评价建筑物理环境的重要部分,影响着人的工作效率、情绪变化等多方面因素.脑干听觉诱发电位(BAEP)是由声刺激引起神经电位活动的客观指标,将其作为人体声舒适的客观评价指标利用小波变换能量分析方法,再结合人体主观感受,成为客观评价声环境舒适度的一种新研究思路.本文对16名听力正常的成年人进行不同声压级刺激下的BAEP实验,将所测BAEP曲线进行小波变换能量分析,引入BAEP能量系数的概念.同时,结合主观声感觉评分,进一步探究声压级、性别与BAEP能量系数、主观声感觉之间的关系.研究表明,随着声压级的增大,BAEP能量系数增大,人体对声音的主观刺激感逐渐加重,声舒适感降低.

Acoustic environment,as an important part of evaluating the physical environment of a building,affects work efficiency,emotional changes and other factors.Brain stem auditory evoked potential(BAEP)is an objective index of nerve potential activity caused by acoustic stimulation.It was taken as an objective evaluation index of human acoustic comfort by using the wavelet transform energy analysis method and combined with human subjective feeling,which becomes a new research idea for objective evaluation of acoustic environmental comfort.In this paper,16 normal hearing adults were subjected to BAEP experiments under different sound pressure levels.The measured BAEP curve was analyzed by wavelet transform,and the concept of BAEP energy coefficient was introduced.At the same time,the relationship between sound pressure level,gender,BAEP energy coefficient and subjective sound perception was further explored in combination with subjective sound perception score.The finding shows that the BAEP energy coefficient increases with the increase of sound pressure level.The subjective stimulation of the human body to sound is gradually increased,and the sound comfort is reduced.