Study of evaluating and measuring method of impact sound.

冲击声评价与测量方法的研究。

基本信息

批准号：
60300003
负责人：
SONE Toshio
金额：
$ 1.28万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

Impact sounds are such sound that are characterized by their high peak levels and short duration time. Thus, it is not appropriate to evaluate and to measure the loudness and the noisiness of impact sounds by conventional methods. We have studied how to evaluate the impact sounds in cooperation with ten laboratories in Japan by Grant-in-aid for Co-operative Research. As the first stage, a round robin test, in which all the participants conduct the same experiments under very similar listening condition, was carried out. In this test, we used repeated impact sounds which are generated by a mini-computer. The stimuli synthesized by a computer were recorded on magnetic tapes by using PCM. Then the tapes were distributed among researchers. This round robin test becomes a very large experiment where the number of the subjects were more than a hundred. The experimental results obtained by the test were as follows:(1) If we express a repeated impact sound in terms of the unweighted sound exposure level, the loudness of the impact sound show rather high relation coefficient(0.97). However, to evaluate the loudness more precisely, we have to consider some time constant which is consider to represent the integral characteristic of our hearing system.(2) As a result of the experiment for noisiness evaluation, the unweighted sound pressure level showed a very high relation coefficient(0.99). This means that this measure is quite effective to evaluate the noisiness of the repeated impact sounds.

冲击声音的声音具有高峰值水平和持续时间较短的特征。因此，通过常规方法评估和测量影响声音的响度和噪声是不合适的。我们研究了如何通过赠款与日本的十个实验室合作评估影响声音进行合作研究。作为第一阶段，进行了循环测试，其中所有参与者在非常相似的聆听条件下进行了相同的实验。在此测试中，我们使用了由迷你计算机生成的重复冲击声音。通过使用PCM将计算机合成的刺激记录在磁带上。然后将磁带分布在研究人员中。该循环测试成为一个非常大的实验，其中受试者的数量超过一百。测试获得的实验结果如下：（1）如果我们以未加权的声音暴露水平表达重复的冲击声音，则影响声音的响度显示出高度的关系系数（0.97）。但是，为了更准确地评估响度，我们必须考虑一些时间常数，这被认为代表了听力系统的整体特征。（2）由于实验进行噪声评估，未加权的声压水平显示出很高的关系系数（0.99）。这意味着该措施可以评估重复冲击声音的噪声非常有效。