952 Studios Construction!

[endorka]

Nice work on these silencer boxes. If possible, their sound attenuation is improved by having the inlet and outlet holes on different planes.

Cheers!
Jennifer

[eightamrock]

Nice work on these silencer boxes. If possible, their sound attenuation is improved by having the inlet and outlet holes on different planes.

Cheers!
Jennifer

That makes a lot of sense! Will try my best to do that when I drill out the holes. Thank you!

[Starlight]

Source of the postIm not really getting the high's through edges of the door, but definitely hearing a tremendous amount of upper mids. If I move my ear to the center of the door, it definitely changes to much more of the lows. I think the seals are tight, the jam itself is of inferior construction. I will have to figure this out.

It may help to think about how different frequencies travel: high frequencies travel in straight lines and bass frequencies travel in all directions.

Stopping higher frequencies is easier because their wavelengths are shorter and so they have a harder time getting through walls than bass frequencies, and with the maze of angles to get round a door jamb or a silencer box's baffles, high frequencies should not be a problem to deal with.

This is why acousticians and studio designers tell us to concentrate on the lower frequencies and the higher frequencies will be dealt with at the same time, as if by magic.

Lower frequencies therefore need mass, more mass and even more mass - as well as larger air gaps in mass-air-mass sytems.

Mid frequencies will have some characteristics of both high and low frequencies but not as extreme as either.

I am impressed at your listening to the escapring sound at the edge or centre of your doors. There must be some space around the edge of the door that is not sealed as tight as it needs to be for you to hear more higher frequencies near the edge. The sound you hear in the centre of the door will be telling you how much mass the door has. If you need more isolation than what you hear at the centre of the door, that points to beefing up the door's mass.

[eightamrock]

Source of the post

Source of the postIm not really getting the high's through edges of the door, but definitely hearing a tremendous amount of upper mids. If I move my ear to the center of the door, it definitely changes to much more of the lows. I think the seals are tight, the jam itself is of inferior construction. I will have to figure this out.

It may help to think about how different frequencies travel: high frequencies travel in straight lines and bass frequencies travel in all directions.

Stopping higher frequencies is easier because their wavelengths are shorter and so they have a harder time getting through walls than bass frequencies, and with the maze of angles to get round a door jamb or a silencer box's baffles, high frequencies should not be a problem to deal with.

This is why acousticians and studio designers tell us to concentrate on the lower frequencies and the higher frequencies will be dealt with at the same time, as if by magic.

Lower frequencies therefore need mass, more mass and even more mass - as well as larger air gaps in mass-air-mass sytems.

Mid frequencies will have some characteristics of both high and low frequencies but not as extreme as either.

I am impressed at your listening to the escapring sound at the edge or centre of your doors. There must be some space around the edge of the door that is not sealed as tight as it needs to be for you to hear more higher frequencies near the edge. The sound you hear in the centre of the door will be telling you how much mass the door has. If you need more isolation than what you hear at the centre of the door, that points to beefing up the door's mass.

This is a great insight as well, I "believe" the mass of the door is good enough for me, it has to be the jams because I can absolutely hear a difference between the center and edges of the door. Id bet I can even measure it, and its not hiss of high frequency. My gut reaction is to beef up the door stops first and see if it helps.

[endorka]

Do you have any photos of the construction of the jams?