It is important to measure not only the noise level but also the "acoustic power level."
The acoustic power level is used to express the loudness of sound emitted from machinery. The acoustic power level represents the total energy emitted by the sound source. If we compare noise levels and acoustic power levels to earthquakes, the noise level corresponds to the intensity at various locations, while the magnitude corresponds to the acoustic power level. Just as the intensity at different locations is not determined solely by the distance from the epicenter, but also varies due to the propagation path and ground structure, in the case of sound, the noise level varies due to the directionality of the sound source and the distance to the measurement position. Therefore, the acoustic power level is used, and especially in Europe and the United States, it is necessary to specify the acoustic power level of equipment.
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basic information
The method for measuring sound power levels is defined by JIS and ISO, and the measurement principles include the sound pressure method and the acoustic intensity method. The sound pressure method uses semi-anechoic chambers, anechoic chambers, quasi-free sound fields on reflective surfaces, and reverberation rooms as measurement environments. The acoustic intensity method includes discrete point methods and scanning methods as measurement techniques. This system is an automatic measurement system for sound power levels using the semi-anechoic chamber method.
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Development/quality assurance line for all manufacturing industries. Manufacturing line for export products.
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A group of acoustic measuring instruments such as sound level meters and vibration meters, particle counters essential for cleanliness management, seismic measurement systems including earthquake meters for disaster prevention and control, as well as ultrasound diagnostic devices, have expanded the product fields centered on welfare and environmental issues. Through a long accumulation of technology and a continuous challenge to new technologies, we contribute to the enhancement of social welfare, safe living, and technological innovation.
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