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在实际的音频工程设计中,工程技术人员经常使用一些音响设计计算尺,使音响设计简便、快捷。下面介绍其中一种多用途快速计算尺的使用方法。该快速计算尺包括点声源声压级的衰减、输入功率与声压级关系、指向性、房间常数、临界距离和声压损耗共6种计算尺,如图1所示。文中涉及到的物理参数及其物理意义、计算公式可参考《音响工程声学设计的快速估算方法》一文(见本期)。
In the actual audio engineering design, engineering and technical personnel often use some sound design slide rule, the sound design is simple and fast. Here’s how to use one of these multipurpose fast slide rules. The fast slide rule includes attenuation of point sound source sound pressure level, relationship between input power and sound pressure level, directivity, room constant, critical distance and sound pressure loss total 6 kinds of slide rule, as shown in Figure 1. The physical parameters involved in the text and their physical meanings can be found in the article “A Quick Estimation Method for Acoustical Design of Acoustical Engineering” (see this issue).