E-Mail: overseas@onosokki.co.jp

Select your region & language

Global

Region

Microphone for acoustic measurement

With reliable technology, we transform sound from "hearing" to "seeing."
~Microphone for acoustic measurement~

The new low-noise microphone MI-1282M10 makes it possible to measure minute sounds that were not possible with previous models. We spoke directly with Ichikawa, the designer of the acoustic measurement microphone, and Nakano, the manufacturer, to find out more.

  • Right: Manufacturing Block, Measuring Instrument Manufacturing Group, Section Chief Nakano Left: Technology Headquarters, Measurement Technology Lab, Engineer Ichikawa
    Right: Manufacturing Block, Measuring Instrument Manufacturing Group, Section Chief Nakano
    Left: Ichikawa, Engineer, Measurement Technology Lab, Technology Division

What kind of product is a microphone?

Ichikawa

This product is a sensor that measures sound intensity (pressure) and pitch (frequency) by converting sound into electrical signals. It is frequently used in research and development and production lines, such as for measuring the sound pressure of prototypes and inspecting defective mass-produced items. In the automotive industry, it's used for detecting abnormal noises in transmission gear production lines. Closer to home, it's also used to check whether the sound pressure emitted by aircraft during flight is below a specified level. Our company offers several types of sensors with different measurable sound pressure and frequency ranges, providing products tailored to various measurement applications. This sensor is also incorporated into the detection unit of sound level meters, playing a vital role in a wide range of applications.

What have been some of the good and challenging aspects of your design work so far?

Ichikawa

When I first took on the development role, I faced difficult technical challenges despite having no prior experience with sound, and it was a constant struggle. However, by reviewing the technology from scratch and making improvements, we were able to successfully bring the product to market, and the struggles turned out to be a valuable experience.

Microphones require a very broad range of technical expertise, and their design necessitates combining knowledge of various fields, not just sound. I feel that working with this sensor has also contributed to improving my own skills.

What about manufacturing?

Nakano

This sensor has very small and delicate components; even a slight scratch on the sound-picking part will render it unusable. Furthermore, the accuracy can vary depending on the assembly adjustments, making the manufacturing process extremely demanding. Therefore, creating a system that ensures consistent accuracy across manufacturers and paying meticulous attention to detail is challenging. On the other hand, there's a great sense of accomplishment when a product that meets the required accuracy is completed.

  • Microphone for acoustic measurement
    Microphone for acoustic measurement

New products were announced in 2024, but could you tell us about your future outlook?

Ichikawa

In recent years, the demand for noise reduction has become stricter due to the need for quieter products, and the measurement range and performance required of microphones have expanded. Therefore, in April, we announced the MI-1282M10 low-noise microphone. It enables the measurement of minute sounds in the 10dB range, which was not possible with previous models, and we expect it to contribute to solving new sound-related problems. Moving forward, we aim to "see what was previously invisible" and will continue our research and development efforts.

Nakano

We are working daily to shorten lead times in our manufacturing facilities. Furthermore, we are automating some processes through the introduction of new technologies such as collaborative robots. We will continue to strive for further improvements and enhancements so that we can continue to provide high-quality products quickly.