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一、前言数据处理技术广泛应用于各个领域,本文以琵琶为例,通过测量和记录琵琶产生的振动和声音信号,经数据处理得到模态参数和声压的功率谱,讨论用客观物理量评价乐器性能的方法。实践证明这种方法是有效的、可行的。各种各样的乐器都是以产生一定的音响为目的。人们对音响的感觉是受许多主观和客观因素影响的。具有同样声能的声音,由于其频率成分不同,人们的感受也不相同。若声音的频率低,人们感觉声音低沉、压抑;若声音的频率为中频,人们感觉轻柔、舒畅;若声音的频率很高,人们感觉刺耳。同样频率的声音,由于能量不同,人的感受也不同,若声能很小,听着非常吃力,若声能很大,那就震耳欲聋了。同样声音,不同的人感受也不一样。有人喜欢高昂
I. Introduction Data processing technology is widely used in various fields. Taking pipa for example, the power spectrum of modal parameters and sound pressure is obtained by measuring and recording the vibration and sound signals generated by the pipa. The objective physical quantity evaluation instrument Method of performance. Practice has proved that this method is effective and feasible. A variety of musical instruments are to produce a certain sound for the purpose. People’s perception of sound is influenced by many subjective and objective factors. With the same sound of sound, because of its different frequency components, people’s feelings are not the same. If the frequency of sound is low, people feel the sound is low and depressed; if the frequency of sound is medium frequency, people feel gentle and comfortable; people feel jarring if the sound frequency is high. The same frequency of sound, due to different energy, human feelings are different, if the sound energy is very small, very difficult to listen to, if the sound can be large, it deafening. The same voice, different people feel different. Some people like expensive