946
Everything else / Re: Sound insulation
« on: September 13, 2008, 12:29:08 PM »
I will b confronting the same issue shortly as I plan to concoct a CHP plant with a 6/1. My approach was going to use principles I have learned from my interest in audio systems. Decoupling is the mantra in that field and as sound is the common issue I see this as the fundamental goal in construction of my engine house. The predominant noise issue with a 6/1 is probably sub sonic to low frequency. In audio sub sonic and LF corrupts the signal from sources and the main solution to this is to decouple the sound source from the loudspeaker as much as possible. So , the stands on which the sound sources sit have spikes on the end of the legs which contact the floor , this minimises the contact area and consequently the sub and LF energy which can b transmitted. The same applies to speaker stands. The technique is very effective.
Therefore I plan to use spikes between the engine / alternator bed plate and the concrete slab on which it will sit. I haven't established the details & dimensions yet. The spikes may have to sit on composite material pads attached to the concrete to prevent fretting. Mid to high frequency noise from the lighter moving elements of the 6/1 can b attenuated with conventional sound insulation materials and methods. Air intake and cooling intake will probably use labyrinth silencing. Exhaust will just use the most massive truck muffler I can accommodate exiting into a large volume box lined with attenuation material. The engine house itself will b constructed from brick with sound insulated walls.
Hopefully that shud achieve close to silence , as the engine house will b within 3 mtrs of my house !!
Therefore I plan to use spikes between the engine / alternator bed plate and the concrete slab on which it will sit. I haven't established the details & dimensions yet. The spikes may have to sit on composite material pads attached to the concrete to prevent fretting. Mid to high frequency noise from the lighter moving elements of the 6/1 can b attenuated with conventional sound insulation materials and methods. Air intake and cooling intake will probably use labyrinth silencing. Exhaust will just use the most massive truck muffler I can accommodate exiting into a large volume box lined with attenuation material. The engine house itself will b constructed from brick with sound insulated walls.
Hopefully that shud achieve close to silence , as the engine house will b within 3 mtrs of my house !!