Hotel newly installed fan, but the fan is too noisy, how to mute it?

There are many noise types of kitchen fans, mostly in the middle and high frequency band, so measures should be taken against these noise types.

Fan noise: The main noise of oil fume exhaust fan is solved by using muffler. The noise reduction of Hanks impedance compound muffler is about 25 decibels, which can solve the main noise problem of fan to a great extent. The noise of general range hood can be solved by muffler.

Pipeline vibration: the smoke exhaust pipeline will vibrate and spread low-frequency noise, especially through the wall. It is necessary to fill the holes with sound-absorbing and sound-insulating materials to prevent vibration from spreading through the wall. At the same time, the external wall pipes will be connected elastically and flexibly to avoid the vibration of the smoke exhaust pipes. For the noise above some pipelines, we will wrap sound insulation felt, sound absorption cotton and other materials on the pipelines to reduce the noise.

For some other noise problems, we will use the sound insulation cover to solve them, such as the mechanical noise of fan equipment. If these noise problems are too big to be solved by a single means, the noise of various types and frequency bands can be controlled by using the sound insulation cover to include the fan main body.