Soeta Yoshiharu, Onogawa Ei
Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Osaka, Japan.
Research and Innovation Center, Mitsubishi Heavy Industries Ltd., Nagoya, Aichi, Japan.
Front Psychol. 2023 Feb 10;14:1128752. doi: 10.3389/fpsyg.2023.1128752. eCollection 2023.
Air conditioners are typically installed in buildings and vehicles to control thermal conditions for long periods of time. Air conditioners generate certain types of sounds while functioning, which are among the main noise sources in buildings and vehicles. Most sounds produced by the air conditioner do not change with time, and the sound quality of steady sounds has been investigated. However, air conditioners can generate low-level impulsive sounds. Customers complain of the discomfort caused when these sounds disturb the silence in their living rooms and bedrooms. This study aimed to determine the physical factors that have a significant effect on physiological responses to low-level impulsive sounds produced by air conditioners. We used physiological responses because it is difficult for people to evaluate sounds psychologically when they are sleeping or are not focused on the sounds. The A-weighted equivalent continuous sound pressure level (L) and the factors extracted from the autocorrelation function (ACF) were evaluated as physical factors. Participant responses on electroencephalography (EEG) were evaluated. The correlation between the EEG responses and ACF factors was determined. The L, peak, and delay time to the first maximum peak of the ACF were identified as significant factors for physiological responses to low-level impulsive sounds.
空调通常安装在建筑物和车辆中，用于长时间控制热环境。空调在运行时会产生特定类型的声音，这些声音是建筑物和车辆中的主要噪声源之一。空调产生的大多数声音不会随时间变化，并且已经对稳态声音的音质进行了研究。然而，空调会产生低强度脉冲声。当这些声音打破客厅和卧室的安静时，顾客会抱怨由此带来的不适。本研究旨在确定对空调产生的低强度脉冲声的生理反应有显著影响的物理因素。我们使用生理反应，因为当人们睡觉时或没有专注于声音时，很难从心理上评估声音。将A加权等效连续声压级（L）和从自相关函数（ACF）中提取的因素作为物理因素进行评估。对脑电图（EEG）的参与者反应进行评估。确定了脑电图反应与ACF因素之间的相关性。ACF的L、峰值以及到第一个最大峰值的延迟时间被确定为对低强度脉冲声生理反应的重要因素。
