Questions tagged [acoustics]

Acoustics is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. Applications of acoustics are for instance the audio and noise control industries.

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32
votes
4answers
442 views

How to deal with the difference in sound when the audience comes in

For mixing in a small church, with cheap equipment, we have the following problem. When we set up all equipment and do a sound-check, all levels are good and the sound is just very good. When the ...
8
votes
1answer
155 views

Fixing acoustics in a glorified hallway

We have a small radio studio that is essentially in a hallway. When on air, you can definitely hear the room coming through the mics. It sounds like there is a lot of standing wave. Our budget is ...
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7answers
31k 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-...
6
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3answers
2k views

What is the best way to mic a hammered dulcimer?

Looking for some suggestions on getting the most authentic recorded sound from a Hammered Dulcimer. The model I am mic'ing has 2 sound holes. What would be the ideal mic type(s) (i.e. dynamic, ...
5
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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 ...
4
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1answer
289 views

Micing a big square room

I do a lot of remote recording sessions for church choirs. Often they use fellowship halls, which typically have a big rectangular room with a relatively low flat ceiling. Obviously, this is less ...
4
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6answers
532 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
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3answers
778 views

How do audio engineers (physically) treat rooms for studios?

Here's my problem: I live in a small apartment downtown São Paulo - it's noisy as it can be. Loud traffic, people screaming and buses circulating day and night. This was never a problem - I usually ...
4
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2answers
301 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 ...
4
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2answers
2k 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 ...
3
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5answers
375 views

Sound design that cuts through crowd noise

I'm about to embark on a sound design project for an interactive piece that will be a public installation. It will always be surrounded by people in a large space (think a trade show floor or lounge-...
3
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5answers
2k views

How does our brain detect the direction of sound?

We are able to detect the direction of sound because of our brain's capbility to measures the time lag and amplitude difference between the sound that reaches our ears. However the sound produced by a ...
3
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2answers
452 views

Mic Position and Acoustics

Here is a general question for field recording: Do you go to great length to try to position whatever you are recording for best acoustics and mic position? Let's say you're recording an elephant. ...
3
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5answers
600 views

Acoustics and Auralex?

I'm about to make a tremendous rework of the acoustics in my studio, and a fix for the 129Hz standing rez-wave that haunts it. Right now I'm looking at Auralex Wedges, considering possibly 4" wedges ...
3
votes
4answers
535 views

How good is your knowledge of acoustics, and how does this affect your sound design?

I'm curious as to how scientific your understanding of acoustics is and how often you draw on this knowledge when designing sounds, editing or mixing. What do you get your calculator out for, and what ...
3
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1answer
1k views

Why do I hear less bass in the middle of the room, and can I do anything about it?

I've recently purchased a pair of monitor speakers in order to build myself a better critical listening environment. I've tried setting them up near one wall in a small room off of my living room, ...
3
votes
1answer
106 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 ...
3
votes
3answers
5k 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 ...
3
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3answers
8k 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
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5answers
553 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 ...
2
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4answers
2k views

Acoustic treatment for glass

I have searched for a bit but haven't found much on this but maybe some of you have fixed a similar problem in the past: Can I put something over glass to make it anechoic? It's a long shot, but I ...
2
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2answers
968 views

What causes proximity effect?

What is the source of proximity effect... the boost in lower frequencies as a vocalist gets close to a condenser mic?
2
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2answers
252 views

Home Studio - Making the best out of what I have

It's setup time and I have several options as to where/how to set up my freshly acquired pair of Adam A7. Three rooms in my house have interesting characteristics but not one is perfect and I am ...
2
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3answers
2k views

Absorbing Room - materials, their shapes, what's the difference?

Internet is really lacking information about acoustics in the room, absorbing materials, it's shapes and patterns.. how to glue them, why there are different shapes. I really would like to know how ...
2
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2answers
5k 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 ...
2
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2answers
41 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 ...
2
votes
1answer
105 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
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2answers
143 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 ...
2
votes
1answer
295 views

Monitor Subwoofer suggestions (economic)

Hey Im l@@kin to invest some money in reference monitors and a sub. Can anybody drop some suggestions for me? My price range is limited to about 600 american dollars and I have a discount ...
2
votes
1answer
45 views

Effect of sound waves striking an object

I am trying to understand the effect an acoustic wave has on an object. I have two speakers, one on top of another, and both emitting a Sine wave of 64Hz generated in MATLAB with a sampling rate of ...
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 ...
2
votes
1answer
976 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
votes
1answer
1k 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, ...
2
votes
1answer
119 views

Acoustic Handlings in a Small Room

Dear All, I have a pretty urgent question here that I need to resolve in one of my record rooms: I have a small room about 13 feet by 10 feet with a 10 foot ceiling. The walls all have fabric on ...
2
votes
1answer
211 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. ...
2
votes
2answers
345 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 ...
2
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0answers
23 views

Designing a home-made shooting room

I am planning to build a "shooting room". I explain myself: I want to reuse a half of an old animal shelter to build a small room (3.5 square meters, 1.7-1.8m height) to store all 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
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2answers
143 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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7answers
8k 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 ...
1
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3answers
5k 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 not ...
1
vote
2answers
527 views

How to deal with a reverby room…

Hello, Basic question. Was sound engineering in a school hall/food mess and the acoustics were something horrible. Reflection city, which resulted in an extremely muffled (especially the low-end) and ...
1
vote
1answer
217 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 ...
1
vote
1answer
69 views

How to interpret the analog output of an SPL meter?

I tried to connect the analog output of a Sound Pressure Level Meter to a digital oscilloscope to determine the RT60 of a room. I thought I will somehow have an analog reading proportional to the SPL....
1
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1answer
185 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
vote
1answer
55 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
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2answers
47 views

How much should volume change for an empty room vs one full of bodies?

So tonight I'm doing a film screening. The room is small and will have about 20 people in it. The room is already absorbent, with painted wood on the walls, carpet on the floor, acoustic tile drop ...
1
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1answer
46 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 ...
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3answers
2k 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 ...
1
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3answers
422 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 ...