Hospital ventilation, patient monitoring, heating, comfort zones. These are all topics that require knowledge of acoustics and possible reduction of noise. Sorama performs research on these topics with university partners. However, our noise control service can also help improve and solve current sound problems in hospitals and clinics.

Low noise levels are important in health care in order to avoid high stress levels. Sorama offers a helping hand in healthcare.


Respiratory System


We made the Macawi respiratory system 6 dB quieter at more than 2 times the requested power. We found that the sound is radiating from the top plate and tube. Also, the motor showed airborne vibrations. This is why we recommended to optimize the top of enclosure and cover the motor back-plate. In the next iteration we found structural noise from the hood, which we suggested could be dampened by adding mass to it.

Sorama Products used: Scan A

Patrick Kleuskens, manager at Macawi/Demcon, tells about his experience with Sorama and the importance of noiseless environments in their field of work:

Breathing Aid

Dolphys Medical

Dolphys Medical develops an innovative breathing aid for use in for instance ambulances. After prototyping, an unwanted sharp tone was noticeable in one out of five devices. Sorama performed measurements to analyze the behavior and to understand the mechanism behind the sharp tone. After the first couple of sound imaging measurements, with a resolution of 4 mm, the position of the obstruction in the air channel was located.

Small clots of glue were in the high speed air channel which caused the whistle. After changing the production method to a level where no obstacles were inside the air channels, a large improvement on fall out was obtained.




We analyzed and reduced unwanted sounds in HandiMove’s lifting system. We found some aero-acoustic leaks which we suggested could be prevented by closing the holes and seams. Also the hood should be dampened to prevent strong structural vibrations. These adjustments resulted in a reduction of 4.2 dB(A).