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Noise localisation and reduction of respiratory system

Goal: Medical blowers for respiratory systems must meet strict noise production requirements. One of our client’s, a designer of respiratory systems, asked us to localise the source of the noise production. With identification of the problem areas, design changes could be made to meet the noise production requirements.

Approach: The transmission of sound through the blower is investigated. Measurements with an acoustic sound camera, in a broad frequency range and from multiple orientations are conducted. The frequency spectrum is analysed and peaks are investigated.

Result: The noise producing areas are redesigned reducing the total sound pressure level and damping the frequency peaks. Within a short time, our client’s redesign met the strict noise requirements and was able to start production.

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