O-Solution DS-5000 Acoustic Power Level Measurement System

Ono Sokki Co., Ltd. (President: Yuji Okoshi), a manufacturer and distributor of electronic measuring instruments, will begin selling the "O-Solution DS-5000 Sound Power Level Measurement System," which contributes to noise reduction in all types of industrial products, on Wednesday, February 7, 2024.

This newly released product is the successor to the "Acoustic Power Level Measurement (Sound Pressure Method) DS-0231A" (compatible hardware: Data Station DS-2000 series / DS-3000 series). It is a system that combines the latest software "O-Solution," the hardware "Data Station DS-5000," and the application "OS-0541 Sound Pressure Method Acoustic Power Level" (optional settings are available).

This product will significantly reduce the workload of engineers by helping to identify the causes of noise from EVs, motors, and inverters, which have been a hot topic recently.

*Acoustic power level: This represents the total amount of sound energy radiated by a sound source and can be evaluated without being affected by the measurement location or environment. It is a global indicator widely used in environmental labels (Eco Mark, Blue Angel) and in situations where the goal is to create a comfortable sound environment. The measurement method is defined by international standards.

Three key features of the new product

• Compliant with the latest international standards

• Calculates the sound power level up to 20 kHz.

• FFT frequency analysis and color contour mapping contribute to noise source analysis.

Target Market

• Analysis of noise sources in next-generation mobility vehicles equipped with E-axles, including EVs.

• Analysis of noise sources from office equipment, air conditioning equipment, home appliances, generators, and outdoor machinery.

Background of Development

Products containing motors or inverters tend to generate high-frequency noise. Since such noise can sometimes be unpleasant, efforts to reduce it are important. However, because the loudness of high-frequency noise varies depending on the listening position, it is difficult to evaluate it using a single-point noise level. Therefore, acoustic power level measurement, which conforms to international standards for capturing sound at multiple points, is becoming the standard. Acoustic power level is used to measure the operating noise of air conditioners and office equipment, and in recent years, its use has spread to the automotive parts and home appliance industries.

This system enables efficient noise reduction by allowing for measurements that comply with standards and easy identification of sound sources and frequency peaks.

Features

Easily perform measurements compliant with international standards and generate reports.

Calculates the sound power level up to 20 kHz.

• More accurate detection of higher frequencies (up to 20 kHz bandwidth in the 1/3 octave band).

• If there are many measurement points, it is possible to divide the measurement into multiple sessions. ^*1

Contributing to the analysis of noise sources

• Simultaneous recording

• FFT, instantaneous sound power level calculation ^*2

• Color Contour Map Display

This system allows for acoustic power level measurement and root cause analysis using a single software program. By observing acoustic power levels in more detail than standard octave-by-octave results, it is possible to efficiently identify the frequency peaks, timing, and location of sound sources that cause noise. Root cause analysis can be performed without the need for remeasurement, leading to cost reductions in noise testing.

*1 Available only if the sound source is reproducible and stable.
*2 Although ambient noise correction and area correction are performed according to the standard, the calculation is performed with a more detailed frequency/time resolution than the standard, so it is not strictly compliant with the standard but is a reference value.

Corresponding international standards

It complies with the sound pressure method standard for acoustic power levels using microphones. An optional add-on allows for measurement of radiated sound from office equipment (such as multifunction printers and printers).

OS-0541 Sound Pressure Method Acoustic Power Level

OS-0542 Radiation Sound Measurement Option (Information Technology Equipment)

*3 Revisions to ISO 3744 are being considered. When revised, a software version update to support the new standard is planned.