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5 votes

Does sound lose quality if sped up and then slowed down back to normal speed?

It depends what method is used. If it's simply played back 'faster' without actually changing the data, then of course there is no lasting damage. This would be how a simple sampler would ordinarily ...
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5 votes

Approximating SPL from dBFS?

You see that tree over there that you're barking up? It's the wrong one. There's nothing up there. Seriously. You're contradicting yourself in your question. You know there's no direct relationship ...
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4 votes

Need help to understand the basic components of sound

The highly simplified answer is that sound in the real world is not sine waves with fixed frequencies. We learn about sound initially as frequencies or notes and simplify the concept down to thinking ...
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  • 8,081
4 votes

What would sound sound like at the speed of sound?

In the special case that we are travelling with the sound source (e.g. in a plane), when we reach the speed of sound, the sound waves in the same direction will not be able to move away from the ...
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3 votes

What would sound sound like at the speed of sound?

I believe Colin Hart's very excellent explanation is false in the second-to-last paragraph, beginning "NOW, ". If I am moving at the speed of sound and make a sound, the sound does NOT move at 686 mph ...
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2 votes

standing waves in strings

Let's use some simpler numbers to illustrate the problem. Let's say the smallest string on a piano is 1m, and has a frequency of 200hz (it's a piano for giants). And let's say the lowest note on a ...
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2 votes

Formula for the sound pressure of a pure tone

This was a question asked in a Digital Sound and Music exam which has been copy-pasted here (even the "ex-pressed" has been left intact). The question only gives two marks. I think this is the answer: ...
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2 votes

Need help to understand the basic components of sound

Ok, let's start from the basics. Audio is usually recorded (sampled - converted from a continuous analogue signal to a digital record) and stored as a series of numbers representing the momentary ...
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1 vote
Accepted

power density and dBm

The -60 is compensating for T being measured in μs rather the s of your first equation.
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1 vote

How to design squeak and creak sounds of metal objects?

Sound Design is a creative pursuit. Consequently the way to progress in Sound Design is to learn the common techniques involved, such as: Sound Recording Editing Layering Pitch and Tone manipulation ...
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1 vote
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Is there a relationship between sound absorption and distance from the source to the barrier?

There are two factors that might muddy your results. First, sound is absorbed by the air, so however you are measuring the sound level after it has hit the barrier, you won't know how much of the ...
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1 vote
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does obstacles in front of sound work bidirectional?

Yes. This is all to do with wave interaction. Wave sources and sinks operate independently of each other, even when waves interact with each other and with the medium through which they travel. This ...
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  • 8,394
1 vote

Need help to understand the basic components of sound

A way to understand timbre and differences between instruments is to interpret harmonics by casting an eye on their spectrograms: The flute has some tremolo visible on the high-end sustained ...
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  • 844
1 vote
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What frequencies does the master volume increase?

Many stereos will generically say their range is from 20hz - 20kHz or somewhere close. This is the range of average human hearing. Each stereo will list somewhere it's frequency response. This is ...
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1 vote

What's the science behind acoustic dispersion?

When there's shear waves (like in an ice layer or a steel rail, the high frequencies travel faster than the low frequencies due to higher shear wave speed. A sound impact source results in a downward ...
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