Quote:
Originally Posted by basjoos
Finished installing my Mitsubishi heat pump 2 weeks ago and it has been running nicely ever since. The rubber vibration isolation feet I installed on the outdoor unit are very effective and I can't hear or feel any vibration or resonance in the house even when standing inside the house next to the wall with the outdoor unit running 2 feet away on the other side of the wall.
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If it's attached to the wall, there is a very good chance sound will conducted.
Almost everything made of solids has a resonance frequency.
There might be sound, but it's at a lower frequency and amplitude than you can hear.
However, you may be able to feel it..
Of course if the resonate freq of the wall, is higher or lower than the range
produced by the heat pump, there won't be a problem.
I've seen pictures of outdoor units mounted on brick walls.
Those might be safe from absorbing acoustic range vibrations.
The energy has to go someplace. Into the Rubber shocks (turned to heat)
or transmitted via air/as sound.
How much energy gets past the shocks, depends on what they are mounted on.
Is the shock mount sitting on a sound conductive medium?
Luckily, not a lot of vibration is emitted by the compressor.
But there is some. If you look at this pic, you can see about six
vibration dampener bags attached to the copper pipes.
The four on the right have brown packing tape around them.
These wrap-around bags contain a putty-like substance.
It absorbs vibrations, keeping the copper from being resonated too much.
