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声强标准由声源、测量传声器、放大器、动态信息分析仪及测量软件等组成。该计量标准装置具有如下特点: 1.采用双传声器的声压梯度技术,克服了粒子速度难以测量的困难。 2.在声强探头频率响应测量系统中,采用自由场比较法,排除了声源频响对测量结果的影响,提高了计量装置的准确度。该套标准装置的总不确定度小于0.31dB。
Sound intensity standards by the sound source, measuring microphones, amplifiers, dynamic information analyzer and measurement software and other components. The measurement standard device has the following characteristics: 1. The use of dual microphone sound pressure gradient technology, to overcome the difficult particle velocity measurement difficult. In the sound intensity probe frequency response measurement system, the free field comparison method is used to exclude the effect of sound source frequency response on the measurement results and improve the accuracy of the measurement device. The standard device of the total uncertainty of less than 0.31dB.