R, Every room and usage is different. The video provides general principles and the basics. You can fill out the information in this link and we can look at your particular situation. www.acousticfields.com/free-room-analysis/
We have explosion proof glass walls where I work. You can beat on them an no one can hear you on the other side, pretty impressive stuff. The whole building is designed to accommodate BSL 4 labs, so the glass walls are the first barrier into a BSL 1 environment.
J, Glass can be a good barrier even at lower frequencies. We just finished designing a concrete / glass barrier for a client in the Hollywood Hills. Concrete was 4" thick and the glass was 2" thick.
"The angle of the glass" if the recording room is treated and isolated how do you find the best angle? And wouldn't any angled diffraction be mitigated by the recording room treatments? Also if you have an 8" wall with air space and you need 12.24" of air space between the panes wouldn't the whole wall have to be built out to match that space?
B, With windows you have to consider them as a "hole in the wall". You have to plug that hole with a glass frame. The density of the plug has to match at a minimum the density of the existing wall.
Just out of pure academic curiosity, if a client had the budget could you build a room with the front wall being all glass with soffit/flush mounted speakers, something like Northward Acoustics do, and do you think all that glass would affect the sound if you had a ton of absorption on all walls?
N, Every surface area contributes to the sonic quality of a room regardless of the treatment on other surfaces. Glass has a negative impact on middle-frequency response.
Good information about the thickness of the space between pieces of glass. My stereo listening room has 7 windows to the outside. I'm trying to control the reflected sound, not he transmitted sound. We're in a rural area. Transmission isn't a big issue. I want to keep the sound from picking up the reflected sound signature of the double pane glass windows. I have bought some thick, clear vinyl. It's fairly soft and pliable. I'm thinking of testing it in one of the windows. (it's 80 gage material, the scale for vinyl thickness is opposite of other gage measurement: thick vs. thin). I'll cut it to size and glue molding around the edges to make is somewhat removable. Based on above suggestion I'll also make the space between the window and the vinyl thicker than I was anticipating and use foam. I won't measure the sound transmission levels as they are of secondary concern with this application. Is this a worthwhile exercise? Other suggestions to deal with reflected glass sound are welcome? I had considered blocking them up with Acousti-Blok (dense, black rubber-like material) but that would kill the wonderful views and eliminate natural light. Indow window inserts are designed to lessen sound transmission but are made of clear acrylic; a stiff material which I don't think will be best for the quality of reflected sound. There are also checker-board like wooden diffusion devises that might be helpful (but less than ideal for looking out the windows).
R, We use two methods to deal with reflections from glass surfaces. You can place a foam collar around the parameter of the glass surface. It must be at least 2" deep. Another approach is to use a series of foam strips that are spaced evenly apart across the glass surface. We use a 3" gap between the strips. The open spaces allow for viewing and the foam reduced the impact of reflections. Most build a wood frame and insert the foam into the hinged frame so the foam frame can be swung open for complete access for viewing.
Ok. I think I understand your general idea and the design may be easy but the details are vague in my mind. Is the foam in contact with the window to act as a damper to prevent window vibrations? Or does the foam act like a diffuser / absorber? Is this design similar to boxed wooden diffusers except by using foam it acts more as an absorber? Perimeter of the window gets foam at least 2" deep . Is that measured from the glass to two inches into the room ? or 2" from the window frame toward the center of the window? Thickness of the foam in the other direction can be what? 1/4"? 1/2" 1 inch?? Three inch spaces from foam strips across the window: Are the strips parallel? in a square pattern? What are the dims of the foam strips? Width / depth? Is there a sketch? I appreciate any clarification you can send my way. As always, Dennis thanks for the continuing education.
You got any guides on how to calculate all these? :) trying to remake my windows because I can gently hear the bass of my monitors in my live room and would like to fix the window :)
@@AcousticFields oh. Maybe those are contributing factors too but my windows are definitely not built right and can hear the leaks thru it too vaguely. Would really love some professional guidance from you 🙏🏻
I have a 4m x 3m room and I play music with an Edifier S360DB 155W RMS 2.1 system. I have a regular window of 120cm x 130cm and a 220x80 regular door. I would like to reduce the leakage amount of sound from inside to outside. I live in Brazil so the things available here and there can be different. A guy build windows here but watching this video makes me think it may not work because of the amplitude and frequency generated by my system will be too much for the window characteristics. It may be quite expensive too and won't fix the issue. The question is, if I treat the room instead, will make the sound travel less to bother the neighbors a bit less too? What you guys think?
Okay, so... Clients and Talent aside: if I have a loud commercial exhaust fan on my apt. roof (several feet above my head) that often makes sleep impossible, I should block my closed windows with what, an array of towels? What range of frequencies comprise an exhaust fan's aural attack, anyway? Blankets on the walls and ceiling too? And if it's low frequencies that comprises this massive aural attack profile, then what?
T, It is always best to minimize noise issues at the source. It will be much cheaper to treat the cause of the exhaust fan noise at the fan. If you reduce noise at source, you may no longer have the noise transmission nuisance value.
hmm, you could also optimize for bass transmission with thin windows. if outside noise isn't a concern but you have bass bildup in a room. and being a window would drive me to resignation too.
the last sentence was just a joke, you misspoke in the video. Correct me if i'm wrong, but soundproof windows also trap more bass inside the room. i'd imagine, thin windows let bass frequencies escape more readily, acting like an absorber. in some scenarios, a thin/light window might be a useful tool for tuning a room.
L, Room acoustics is a balancing act between treatment (absorption/diffusion) and noise transmission. Every room usage, size, and volume along with noise frequency and amplitude must be calculated. Thin glass windows can actually produce more middle and high-frequency noise because they go diaphragmatic with the pressure exerted upon them by low-frequency waves.
Akthough I admire your knowledge, you're not SOUNDPROOFING/MANAGING, You're always doing acoustic TREATMENT. Focused on making things sound better. Your video's title is misleading because I'M looking for something to help manage the amount of sound that LEAKS OUT or LEAKS IN from the OTHER SIDE. This is NOT what your video explains. Wasted a phone call on that, and man am I ticked about that.
