Acentech conducted a noise audit of a prototype medical vacuum-assisted biopsy device, consisting of a motor/pump assembly connected with tubing to a separate handle/needle assembly. As a result of the noise audit, Acentech developed and evaluated candidate noise reduction strategies, and reported on findings. Our findings led to two approaches for reducing the total radiated sound from the unit. The first approach recommended was to place the motor/pump assembly within a flexible pouch/enclosure designed to attenuate the (primarily) high frequency noise radiated directly from the motor/pump body. The second was to use a small muffler designed to attenuate the remaining, largely lower frequency, periodic airflow-related pulsation noise emitted primarily out the pump outlet tube. Th

Join for free to read