Questions tagged [acoustics]

The physical science of sound production, behavior, and mechanics.

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3
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2answers
141 views

How could the Greek (Pythagoras et al.) measure the frequencies - as they didn't have a mobile app? [duplicate]

How could the Greek (Pythagoras et al.) measure the frequencies - as they didn't have a mobile app? They didn't have a tuning fork or any other standardized measure. But even without standards they ...
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2answers
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how to tune a spring?

So here's the situation I'm in; I had this really weird dream with this really weird instrument in it. It was kinda like half a dulcimer with springs on it. There were 11 springs on it, (But I'm ...
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3answers
562 views

Accounting for intervals not present within the chord ratio?

Here are a selection of chord ratios.. Minor Chord - 10:12:15 Root (1:1) - Major 3rd (4:5) - Perfect 5th (2:3) Major 7th Chord - 8:10:12:15 Root (1:1) - Major 3rd (4:5) - Perfect 5th (2:3) - Major ...
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6answers
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Do interval ratios take overtones into account or solely the fundamental frequency?

An interval holds two pitches (C an G). Those two pitches have a fundamental frequency which represents their pitch names, along with their harmonic series/overtones. When we turn that interval into ...
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2answers
96 views

Harmonic series role in a just intonation interval ranking?

In my studies, I was reflecting on this theory and just wanted your guys clarification.. A pitch in an octave is comprised of a fundamental frequency followed by its overtones. When we focus on an ...
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1answer
157 views

I have questions revolving around the formula of producing chord ratios?

Good day guys! Thanks to the gentleman @willross1 and others contributions, i have now discovered the formula behind turning interval ratios into chord ratios, which allows me to determine the level ...
3
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1answer
90 views

Stability of chords

I wish to understand the connection of music theory to the physics world, or to waves. In this context, I quite understand notion of dominant chords as containing tritone, which is dissonant. What I ...
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3answers
73 views

Echo reduction - large room

I was asked to propose a solution to reduce echos in a large event hall measuring 70 feet long by 60 feet wide with ceiling height 14 feet( I have never done anything of this sort before). The room ...
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4answers
1k views

How are chord ratios developed exactly?

Major Chord 4:5:6 Minor Chord 10:12:15 Diminished Chord 20:24:29 Are 3 examples of triad chord ratios. My question is how are these ratios developed? If we look at a Major chord in the key of C, it ...
2
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3answers
80 views

Fourier Analysis of varying classical guitar bracings

I am doing a school project right now concerning studying the Fourier Analysis of a sound recording of a few different classical guitars. I am wondering what type of sounds would be the best to record....
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5answers
769 views

Physics of Guitar frets and sound

I understand how Guitar works. Pitch/Frequency of sound produced depends on length of vibrating string. So we have different frets to product different notes. Fine. However I am curious to understand ...
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2answers
83 views

When the human voice changes pitch are certain interval changes physically easier?

I'm wondering along the lines of physics and how things resonate. I don't know how pitch changes work when something vibrates, especially the voice or wind instruments. I sort of understand that a ...
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3answers
126 views

Music Physics Question - Automatic Trumpet Embouchure Mouthpiece

So this might be a bit of a newbie question. I'm a working musician who mainly plays guitar and piano, and uses a lot of sampled instruments and synths as well. I don't mean this to be offensive to ...
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5answers
994 views

Scaling an object to change its key

I used a 3D Printer to make a kid's Recorder for my son. It plays surprisingly well. However, it's not tuned to match the common recorder used in schools. Using a phone-app tuner, the base mouth-piece ...
3
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3answers
333 views

Amplitude of a crest and trough in a sound wave?

Lets say we have a sound wave, it has a frequency, wavelength, crest, trough, etc. My question is, is the crest of a sound wave equaled to high amplitude/ high volume and if so, does that mean the ...
6
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1answer
130 views

What are the effects of the shape of a bend in a brass instrument slide?

Some brass instrument manufacturers make a feature of the shape of the various slides - some have a semi-circular wrap, other more semi-elliptical. Some have a tight wrap (the two legs of the slide ...
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2answers
361 views

Is there a noticeable difference in sound quality between a mechanical pipe organ and an electronic one?

What I'm trying to get a feeling for is how well an electronic organ can mimic the sound of a pipe organ. I know there are very advanced electronic organs where every single note for every stop is ...
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0answers
151 views

Irregular resolution [closed]

What are the primary conditions concerning the IRREGULAR resolutions of the following harmonies in common practice music?: -Dominant chords -Auxiliary Seventh chords (chords of sequence) -...
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3answers
103 views

A truly perfect unison

Two notes are two notes. At least, it seems that way. When people play two notes at two frequencies, they sound like two notes, even when they're playing in unison. There are a variety of factors ...
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6answers
349 views

Accurate understanding of the physics of sound?

I'm trying to learn theory. I'm starting with the physics of sound as the base. Here is what I (think I) know. Is this accurate? Music is sound. Sound travels in waves. Sound waves have two ...
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2answers
703 views

How do I know where to place holes on an instrument?

I've been trying to build a double reeded instrument out of plastic straws. I've run into a problem though, when I place fingering holes, the instrument doesn't seem to follow the $$f=/frac{nv}{4L}$$ ...
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2answers
103 views

How effective are acoustic panels to deaden a room?

I need to deaden an echoing drum practice room and am considering acoustic panels, probably DIY ones 3.5" deep filled with rock wool. I'm look at these vs. heavy blankets for aesthetic reasons. I'd ...
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2answers
200 views

Calculation of a note's frequency in the 18th-19th century

Suppose you are trying to reproduce an A major scale from the early 18th or 19th century, when A4 was perhaps tuned to 429.3Hz. What is the correct frequency (in Hz) for the next C# up (assuming we ...
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3answers
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What is brightness?

I hear the term get thrown around a lot, and it seems pretty nebulous. Usually, it's invoked under the heading of tone, but I've heard it linked to intonation and a handful of other categories. At the ...
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1answer
54 views

Microdynamics of bow rosin and strings

Discussion in comments here questions whether the rosin on bow hairs changes physical characteristics in the course of stimulating vibration in a string. Consensus seems to be that: the physical ...
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1answer
136 views

Why do B and C resonate sympathetically?

While experimenting with piano acoustics I came across this weird phenomenon. Having an open B string and then hitting the C above will cause the B to resonate! This also works with open C and playing ...
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1answer
49 views

Isolation of acoustic body size with respect to volume and sustain?

Let's say we have two identical acoustic guitars with the only difference being the body size. How will the body size effect sound volume when considering a string plucked with the exact same amount ...
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4answers
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What causes overtones at harmonic frequencies in an instrument? [duplicate]

I know when a string is plucked on a violin you can hear many overtones at harmonic frequencies, but where do these overtones come from? Does an ideal string vibrating in a vacuum vibrate at the ...
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3answers
269 views

Alternatives to acoustic foam

I get health reactions from acoustic foam. I tried different brands. It's unfortunate. Still, i would like to treat the acoustics in my little home studio as good as possible. What could i use as ...
8
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1answer
226 views

Why can a vuvuzela only play one pitch, while a non-valved bugle can play many?

According to our collective nightmares from the 2010 World Cup Wikipedia, the vuvuzela is a monotone instrument; it famously plays (roughly) the B♭ below middle C. Why is the vuvuzela restricted to ...
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2answers
507 views

How much louder than an upright is a small grand piano?

I now have a kawai upright (height 135cm) and I'd like to upgrade to a small grand piano (around 170 cm I think). I'm wondering how much louder it will be. I don't really need a louder piano, my ...
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4answers
975 views

Does shape of waveform affect sonic perception?

Title says it all - does the shape of a wave have any effect on how we perceive it as a sound?
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1answer
125 views

Textbook vs real world explanation of loudness perception

I read that if you double the number of instruments playing, i.e double the amount of acoustic energy, then the perceived loudness rises by 3 dB. I've also read that a 3 dB change is almost ...
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3answers
435 views

Piano Tuning: How accurate is ±0.5 cents?

A tuner accuracy is ±0.5 cent. Does that mean that it is highly sensitive or just decently sensitive for pitch accuracy?
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2answers
2k views

Trumpet Peculiar Frequency spectrum

So I made this frequency spectrum analyzer and tested various instruments playing a certain note. There doesn't seem to be any problem with the 'equalizer'. However, I found the spectrum for trumpet ...
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1answer
395 views

Are the Piattino Sound Proofing Castor Cup really efficient and are there other equivalent solutions?

I am improving my piano practice room and I found recently the Piattino Sound Proofing Castor Cup. These work, as far as I understand, by absorbing vibration from the piano to the structures around ...
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5answers
7k views

Can eggboxes really be used to treat a room? If so, how?

I'm thinking about acoustically treating my room so I can listen to my mixes in higher clarity. I'm trying to think of how I can do it cheaply (even though you get what you pay for, I suppose), and my ...
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2answers
981 views

Bass guitar: Fret distance formula

I just set off a new trip to the wonderful world of fretted instruments. I bought myself an electric bass guitar (cort c4h). My question to you is what is the formula of the fret distances along the ...
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1answer
104 views

Does the THX Deep Note Actually Increase in SPL/IL?

This may be more of a question for the Physics StackExchange, but I thought I'd post it here since it is in some sense a musical question. The Wikipedia article on the Deep Note includes the ...
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4answers
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If I change the pitch of a C major scale can I get to any major key?

Say I recorded an audio of C major: do re mi fa so la si do. Now imagine I used some software to change the pitch higher (I think Audacity has a feature like this). I was wondering: if I change the ...
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2answers
89 views

Room Acoustics for Singing

I'm working to improve my singing ability at a very basic level. During the week I have access to three different rooms 1) with a lot of echo (bare walls, ceiling and floor) 2) One that has a little ...
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5answers
2k views

How do multiple sound waves interact physically to create music?

What happens on a physical level when many notes/sound waves interact with each other at the same time? (For example, a big chord on the piano with all of its harmonics/overtones clashing together.) ...
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2answers
720 views

Is there actually an “undertone series”?

We know there is an overtone series, or harmonic series, i.e. if a note A of 440 Hz is being played on a musical instrument, there will also be different amplitudes of sound of 880 Hz (440 Hz * 2), ...
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1answer
2k views

Loudness of instruments - musician's viewpoint [closed]

I have been wondering how loud seem instruments to musicians that play them. Let's say that you put an instrument in a room with average acoustics and measure loudness that musician hears and loudness ...
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1answer
83 views

Is there some means of expanding the range of a capped reed instrument?

Given the pitch limits of capped reed instruments, I wondered whether some means of expanding the range of such existed. Perhaps with some sort of embouchure mimicking device surrounding the reed, but ...
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2answers
9k views

Sound proofing a wall with rockwool. What's the best density?

I share a wall with a neighbour and I am looking for ways to isolate it a bit more. I read that rockwool does a good job. It might be important to mention that practice instrument is a piano and ...
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1answer
88 views

Why are pedal notes in the lower, not in the higher, register?

At church today I listened to an organ piece that had a constant pedal note from the beginning to the end of the piece. The strange (and very unpleasant) thing about this pedal note was, that it was ...
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2answers
742 views

What makes some instruments louder than others?

Main question: are longer pianos actually louder? Context: When a musician plays on an acoustic instrument, I expect that the loudness produced corresponds to raw energy (as measured in Joules or ...
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3answers
3k views

How did baroque music sound at the time?

Historical context Let's for example consider Toccata and Fugue in D minor, BWV 565 (click here to enjoy). It was composed at the very beginning of the 18th century in Germany. At that time: ...
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6answers
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Does piano soundproofing require floating walls? Getting conflicting answers from professionals

I have just placed a new hybrid piano in a small 9x13 room in my apartment. I want to use the room for playing and for singing. Costly steps have already been taken, and, much to our dismay, we ...