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Questions tagged [acoustics]

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2
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2answers
30 views

best material to absorb Sound

The Loft that I live in used to be a city hall building. The hallways and lofts have very high ceilings and have a horrible echo problems. I am considering hanging some type of sound absorption ...
0
votes
1answer
31 views

“Super W” neoprene pads for electronic drum decoupling platform?

I am looking to build a platform for my electronic drums to decouple vibrations (mostly from the kick) to the building structure. The 'tennis ball' platform is a recommended DIY solution often found ...
0
votes
1answer
26 views

Shockwaves: loudness or speed?

I got into figuring out decibels, and loudness measurements, and found the number 194dB as the boundary at which a sound starts distoring itself, namely creating vacuums which supposedly turn into ...
0
votes
1answer
45 views

Reducing Noise Levels in Dog Shelter Inexpensively

This isn't acoustic design for recording, but certainly related to a number of posts I have seen here. I'm looking to make a dog shelter quieter for their own well-being. It gets very loud around the ...
3
votes
1answer
61 views

Acoustics exercise

I have been asked to solve this exercise. An environment of $V=1500$ $m^3$, it is considered a reverberated field acoustic pressure level of $70$ $dB$ when an acoustic source of $80$ $dB$ is ...
2
votes
0answers
20 views

Directivity index measurement - steps to follow

I am interested in measuring the directivity index of a loudspeaker. I have been looking on the Internet information about the setup, but unfortunately the information I have found so far has to do ...
0
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2answers
198 views

Question about the Haas Effect

I'm reading an interesting article about incorporating the 'Haas Effect' during the mixing stage of a song but I can't understand the following extract: “The Haas trick adds to the standard panning ...
0
votes
1answer
39 views

How does “transcribe!” or guitar tuner work?

Suppose that we have a microphone-recorded note, say played on a guitar, and we want to write a computer program which will detect the note frequency. There are already plenty of such programs. How to ...
2
votes
1answer
87 views

Portable anechoic test chamber microphone suggestions

For my senior design project, we're creating an acoustical test chamber that will measure the frequency and the sound pressure of the electrical device that is put in the chamber. The chamber won't be ...
-1
votes
1answer
48 views

Can I get a recommendation on how big and what type/brand of PA I need?

I am creating a performance space, mostly for music. Presently, it is a 4000sq. foot empty warehouse. We were thinking that the audience could be around 500. Someone said that we should get a ...
2
votes
1answer
27 views

Advice on calibrating complex stimuli that vary in amplitude and also decay over time

So I am finding it difficult to calibrate for a particular signal that changes in amplitude over time, and is randomly presented to a listener over a time span. I have attached a picture of the ...
1
vote
1answer
50 views

Do I really need to dump tons of sand into the stage i'm building?

I am building a 16x24x3 stage in a 4000 square foot warehouse, to be used principally to showcase music. A local audio guy has told me that I have to fill the wooden framed stage with sand. This ...
1
vote
1answer
35 views

Designing a diffuser to direct reflections to side walls

Floyd Toole in Sound Reproduction recommends using a diffuser on the ceiling that should scatter sounds from front loudspeakers that would normally be reflected to the head locations of listeners. He ...
1
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0answers
41 views

Front acoustic absorber placement with in-wall speakers [closed]

I'm building a home theater and plan to use an acoustically transparent screen with in-wall front speakers. Toole's Sound Reproduction book suggests three to four inches thick of acoustic absorber ...
0
votes
1answer
85 views

cancel out audio in a recording with convolution, phase inversion

If I am playing audio out of a speaker into a room, and there is a microphone in the room recording all the sounds in the room, can I cancel out the sound produced by the speaker in the recording? I ...
3
votes
1answer
56 views

Purely Mechanical Acoustic Frequency Converter

I'm an electrical guy, so I know how to make a frequency converter electrically. Or by using software through resampling, etc. My mechanical understanding of the world is much more lacking. What I'm ...
2
votes
2answers
642 views

Reduce bass through wall to neighbour

I like playing loud bass heavy music but I have some problems with a neighbour hearing much of the bass through the wall. I have painted a picture of the situation. The colors are indentified as: ...
1
vote
0answers
56 views

How to simulate crowd noise with acoustic instruments?

How would I simulate the cheering, applause, and whistles of a crowd using acoustic instruments (and possibly amplification)? Preferably it would be nice to limit it to needing 1–2 musicians to ...
1
vote
2answers
3k views

How does a cardboard paper towel roll amplify the sound?

My daughter and I did a project and made this: http://osxdaily.com/2014/07/28/diy-iphone-speakers-paper-towel-roll-plastic-cups/ We hypothesized that the sound was "amplified" because it directed ...
0
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0answers
60 views

What are the Ideal Dimensions for a Reasonably-Sized Studio?

What would be the ideal dimensions; acoustically and logically, to build a free-standing studio? Say you have a small mixing desk(~30''), two average-sized monitor speakers, a computer + screen (the ...
0
votes
7answers
7k views

What would be the best “egg-carton” acoustic treatment method?

We are working on treating one of our "studios" at school, which is used for video recordings. The reason behind this project is that it currently sounds like a bathroom. We have thus collected ...
0
votes
3answers
918 views

Are styrofoam skyline diffusers efficient as wood?

I'm making my own Skyline Diffusers using a pattern I got from the Internet, and the recommendations were to use a lighter type of wood, such as Pinus. The problem is it's still too heavy, once I'm ...
2
votes
1answer
588 views

what is the purpose of the internal volume of a speaker cabinet

I've been reading a bit about speaker design but I haven't been able to find what purpose the internal volume of a speaker cabinet serves. From what I've read, having an internal volume causes extra ...
2
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2answers
115 views

Simulating Resonant Bodies

Background I am working on synthesized patches using a combination of additive and subtractive methods to create a digital orchestra. The goal is not to recreate orchestral sounds, but rather to ...
0
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2answers
68 views

How can i prevent/reduce bass trapping?

I have to put my monitors in two corners. What can i do to prevent/reduce bass build up issues?
1
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3answers
4k views

Can noise be reduced by 7 decibels with a curtain?

I would like to reduce noise in my room and found a site selling curtains which can reduce noise by 7 decibels. Is this kind of reduction really possible with just a curtain? I wonder if this is ...
0
votes
2answers
111 views

Room Frequency Hum

In my apartment I always had the same problem with D2 at ~146Hz. It feels like a deep hum. The distance between speakers and wall is about 2.38 meters, so f = v / L L = v / f ---> L = 343[m/s] / ...
0
votes
1answer
68 views

standing waves in strings

this is for my acoustics and sound lab and I am lost. please help! The length of the smallest string on a piano is about .15 m long and has a frequency of 4186 Hz. The lowest note on a piano has a ...
3
votes
3answers
4k views

What is the best shape for passive sound amplification

I'm asking this to make a passive sound amplifiyer. In the web they usually do a HORN shape that looks like exponential function mirrored about 'x' axes. But I wonder is there a better shape for ...
2
votes
1answer
735 views

Does the shape of an acoustic/vocal booth matter for maximum isolation?

I am building a vocal booth at home, so I can do voice over work. Now I have some Wood lying around, & will build the booth with wood. I am confused as to, what shape I should build it in? So, ...
1
vote
2answers
104 views

Why does the internet sound like a sine wave [closed]

I scraped a couple of webpages, then in java converted every letter into a number zero to nine dependent on how far along the alphabet it is. I then turned these into pairs of digits. I imported this ...
1
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0answers
97 views

How can I simulate the microphone response of a bullet's reflected shockwave?

I am doing a project on gunshot acoustics and I need to simulate a realistic microphone response of a supersonic bullet for the same. I have to include the shockwave, the muzzle blast and their ...
0
votes
3answers
157 views

New auditorium construction— where is the 100% perfect place for sound?

I work for a church as a system admin. Considering the size of the organization, my tasks also involving being the go-to guy for research and making any decisions involving any form of technical ...
3
votes
1answer
276 views

Can sample-based virtual instruments and an excellent digital piano recreate tone color?

What I'm essentially asking is to what extent can a digital piano, given reasonably affordable and excellent equipment, replace an acoustic piano. But that's a bit open-ended, and I'm really ...
0
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1answer
1k views

Harmless alternative to Fiberglass, Rockwool, …, Bass absorbers!

I finally moved my Studio out of my Bedroom in to a designated Room. (I got the room for free so I won't use another room iven if the basic geometry is kinda bad) After playing around in the room (l: ...
0
votes
1answer
253 views

HiFi components vs. all-in-one systems

I wonder if there is a simple explanation (for a music lover but not specialist) of the advantage of HiFi components (receiver + CD player) vs. an all-in-one system? The former is more expensive, but ...
2
votes
1answer
209 views

All-in-one CD-receiver vs. component receiver

I am looking for a music system for my living room. I haven't been really listening to the music at home for years (only going to classical music concerts), and now want to bring it back into my life. ...
4
votes
2answers
1k views

Home recording, how to isolate non-constant street car noise?

I moved into this 2 BR apartment on the 5th floor in a building residing in a main street (didn't think about it when I got it ), and even at night (even after 1-3 AM) there's always a car or a truck ...
4
votes
6answers
495 views

Is there a music genre or type of sound to help drown out background noise for the purpose of concentration?

I would like to be able to play something in a pair of headphones that works to drown out the background chatter of, for instance, sitting in a cafe. Is there a type of sound, or genre of music ...
4
votes
2answers
6k views

Planning a simple setup for recording violin

I am an amateur violinist. I would like to start to record my playing, doing the recording myself. I will be playing and recording classical, eastern European folk and Jazz. I would like your help in ...
2
votes
2answers
304 views

Active noise control barrier at tunnel openings in undergroundsubways

I know that Noise cancellation never works on scales larger than the sound's wavelength.but,at underground stations during the train arrival time we experience a lot of disturbance which sometimes ...
6
votes
7answers
24k views

What are good alternatives to studio foam for a home studio?

I have built a vocal booth for my own studio and plan to line it with acoustic studio foam (a.k.a., "egg-crate foam"). However, acoustic foam is very expensive (http://www.amazon.com/Acoustic-Foam-1-1-...
1
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2answers
124 views

career in acoustics

hello, i am considering shifting my career path towards working in acoustics. in particular architectural acoustics, environmental acoustics and noise control. however, my academic background is in ...
1
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3answers
402 views

rock wool absorption

Hi, I want to make my own bass trap and i can not find rock wool in 10 cm thickness. In terms of absorption quality is there any difference to stack two 5cm rock wool plates together to form a 10cm ...
0
votes
3answers
1k views

Owens Corning vs Cotton Batts

Hello all! I am looking to build some acoustic panels and a small sound booth. At first I thought about buying Owens Corning but am unsure about how safe it is. I would be installing them in my home ...
1
vote
1answer
187 views

How to improve acoustics of a 16 meter square garage on a budget?

I'll be renting a garage now for practice. It will be used for several bands. The garage size is 16 square meters and it doesn't matter if it's loud outside (these garages are pretty far from the ...
3
votes
3answers
4k views

DIY Aquaphone material selection

First I would like to say that I really love this place. As a sounddesign student, social sounddesign has been invaluable and a great inspiration! Thanks to all of you for that! Now, on with the ...
2
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0answers
129 views

Nice read about reverb [closed]

Not a question, but thought this was an interesting article about some reverb/acoustics in England :) http://www.bbc.co.uk/news/magazine-20773690
2
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5answers
425 views

Determine whether resonance/standing waves are from speakers or room?

I have two massive resonances (more than 12db above the response curve elsewhere) with my bookshelf monitors placed on a desk in a large furnished, carpeted room. One is at about 110 Hz and another ...
0
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5answers
159 views

topic for presentation

guys, i need some help here. i need to give a presentation as a part of my college assignment. can anyone suggest me a topic please. i have thought about Acoustics or 3D audio. but then acoustics ...