间歇噪声主观烦恼度研究

为研究时域参数改变对间歇噪声主观烦恼度的影响,采用成对比较法,在70phon和75phon两个响度级下,对125～4000Hz各倍频程中心频率下间歇性纯音的主观烦恼度进行了实验研究.结果表明,频率、响度相同的间歇性纯音,其烦恼度与持续时间、间隔时间具有较好的关联度,持续时间相同,间隔时间越短,烦恼度越大;间隔时间相同,持续时间越长,烦恼度越大;连续纯音比间歇性纯音的烦恼度更高.通过对具有连续谱特征的间歇噪声的主观烦恼度研究,发现其与间歇性纯音的上述实验结果相一致.另外,在响度级、持续时间和间隔时间相同时,对250r～4000Hz的间歇性纯音,频率越高,烦恼度越大,但对250Hz以下的间歇性纯音,125Hz比250Hz烦恼度更大.

Investigation into the subjective annoyance of intermittent noise

In order to study the effects of time-resolved noise parameters on subjective annoyance, participants were subjected to intermittent pure tones in the range from 125 Hz to 4000 Hz. Paired comparison experiments were performed at loudness levels of 70 phon and 75 phon. At the same frequency and loudness level there is a strong correspondence between the annoyance and the burst duration or interval time of intermittent noise. Noises with the same burst duration but a short interval time can lead to a high degree of annoyance; Noises with a long burst duration can reveal a high annoyance degree for the same interval time; and the annoyance degree of continuous pure tone is higher than intermittent pure tone. The subjective annoyances of intermittent noises with a continuous spectrum are very similar to those caused by intermittent pure tones. Moreover, for a given burst duration and interval time, higher frequency noises are more annoying for frequencies between 250 Hz and 4000 Hz. For the intermittent noise, however, 125 Hz is more annoying than 250 Hz.