An acoustic silencer nozzle (18) for ventilation and exhaust fans.

The muffler is used as an accoustic sound proofing device designed to reduce the loudness of the sound pressure created by the engine by way of acoustic quieting.

Mufflers are engineered as an acoustic soundproofing device that are designed to reduce the loudness of the sound pressure created by the engine by way of acoustic quieting.

The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine by way of acoustic quieting.

The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine by way of Acoustic quieting.

The muffler improves the noise-absorbing effect of the existing muffler effectively.

  The suction muffler is provided with a muffler body which forms a sound deadening space, and also with an outlet pipe for connecting between the sound deadening space and the suction valve.

A system and method for adjusting an acoustic signal from a muted state to an unmuted state by varying an attenuation factor applied to an acoustic signal by an acoustic processor.

An acoustic silencer nozzle (18) for ventilation and exhaust fans.

The butterfly valve noise suppressor according to the present invention provides a better acoustic result compared to a muffler used in a conventional butterfly valve, and is lighter, durable, simpler and more economical to manufacture.

Silencers (74), (76) and (86), and an air pump sound box (110), provide for the quiet operation of the wine must pump (10).

Low Volume – when played acoustically, it’s extremely quiet.

This reduces vibrations causing acoustic noise, enabling the motor to be operated more quietly.

Permissible sound level (not covering AVAS and replacement silencers

Silencers (74), (76) and (86), and an air pump sound box (110), provide for the quiet operation of the wine must pump (10).