We provide on site acoustic analysis, sound level measuring, custom engineered noise pollution and vibration control products that are professionally installed for a turn-key project. 地铁、高铁、高速公路、高架桥、城市环境等隔声屏障的专业设计施工、安装、检测。
This instrument, which realized digital weight and frequency analyse by software, used microphone, amplifier, data acquisitive card; it had the function of data record, data taking, real-time analyzing and A-weight sound level measuring. 该仪器硬件采用传声器、放大器及数据采集卡,通过软件编程实现数字计权及频谱分析,具有噪声信号的读取、记录、实时分析,以及A计权声级的测量等功能。
The Application of Sound Pressure Level Measurement ( SPLM ) in the Measuring of Sound Isolation and Leak of Vehicle Cab 驾驶室隔声漏声的声压法测量
The figures can be used to easily calculate the sound power level of the sound source inside the duct through measuring the SPL at a single point outside of the duct. 利用这些图和简单公式,通过测量管外一点的声压级就可确定管内声源声功率。
The working principle of pistonphone and the measurement principle of its sound pressure level are summarized. The paper emphatically analyzes the methods for measuring the nominal effective coupler volume and the sound pressure level of piston-phone with unknown coupler volume. 本文简要介绍了活塞发声器的工作原理及其声压级的测量原理,着重分析了未知耦合腔体积活塞发声器的有效体积与声压级的测量方法。