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Questions tagged [frequency]

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10
votes
3answers
455 views

What is the “level” of Frequency Modulation of many synthesizers?

I am currently working on FM synthesis and while I do understand the roles of carrier frequency, modulator frequency and modulator amplitude, I've been having problems with understanding how lots of ...
7
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8answers
2k views

What are your favorite spectral tools?

What are your favorite software tools for spectral analysis/manipulation? And what do you use them for?
6
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2answers
3k views

Frequency and emotional response

I remember that a few months back, someone copied a link to a site that had a great display on the frequency bandwidth and what frequencies affected which emotions and what instruments and or sounds ...
5
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11answers
5k views

Why can cheap mics be eq to sound like expensive ones?

Other than frequency response, what makes a mic sound good? Say there is a cheap microphone, and an expensive microphone with same frequency response/selfnoise/sensitivity/polar pattern. Now we ...
5
votes
1answer
851 views

how can I make sounds of different frequencies appear subjectively equally loud?

I'm making an experiment where I play pure tones of three different frequencies (220 Hz, 440 Hz, 880 Hz) at 75 dB SPL. I've noticed that they don't sound equally loud, and I would like them to. I ...
4
votes
10answers
3k views

Un-easy frequencies used in film to create tension?

Hello soundies.. I was wondering if anyone knew an example of when a film has used a single tone frequency (or if they ever have) that sits below the mix and creates an almost subliminal 'uneasy ...
4
votes
5answers
2k views

Completely cut frequencies below a certain threshold

I'm warming up to Ableton Live by attempting to manipulate songs into how various animals would hear them. For example, idealized bats hear roughly between octave 7, starting at 1.28kHz, to octave 13,...
4
votes
4answers
34k views

Is bass boost harmful?

I recently bought a Sony headphone which has "bass boost", and I really love it. I love it so much that I increased the bass (low frequencies) on every device I use it on, with like 7db and decreased ...
4
votes
2answers
368 views

Films that push the boundaries of Sound Design?

For example in 'Irreversible', the first 30 minutes there is a underlying sound frequency of 27hz - this makes you feel physically sick and disorientates you. Do you guys know of any films that use ...
3
votes
1answer
269 views

International Travel with a wireless kit?

Hi guys! I'm looking to buy a wireless mic kit to use for on location recording for a upcoming documentary. The problem is that this docu is going to be shot in different locations all over the ...
3
votes
2answers
395 views

How wide are critical bands?

I hope this is the most appropriate SE site to ask a question about psychoacoustics. I don't quite understand critical bands. As far as I know, if two pure tones which frequencies are inside the ...
3
votes
2answers
111 views

Scales vs. Harmonic Notes

If an ambient sound is to be generated with specific frequencies, would it, in general, sound better if those frequencies are notes selected from a specific scale, or frequencies that are all harmonic ...
3
votes
1answer
48 views

Why is there no signal above 11025 in my 44100 recording?

I'm analyzing an audio recording made on a newish MacBook Pro in Logic, using the internal mic. Looking at the spectrogram, there's nothing above 11025 Hz, which is disturbing— if it were, say, 15kHz ...
3
votes
3answers
871 views

Is there scientific studies into certain frequencies relating to colours/light/mood?

Hello. I'm working on a little web project (I'm a web developer by trade) where it's basically a mouse controlled synth inside a browser. Nothing fancy, but it's letting me get to grips with some of ...
3
votes
1answer
39 views

Can steady-state noise contain a fundamental frequency?

I am doing speech-in-noise testing. We use the so-called matrix test. The Flemish/Dutch version of this test features a female speaker. I ran some sentences through 'Praat' and it provided me with a ...
2
votes
9answers
22k views

What is the frequency step formula for 10 and 31 band EQs?

What is the formula to calculate the bands ranges of a graphical EQ on a mixer? 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400Hz ... etc It seems some of them are doubles. When ...
2
votes
2answers
61 views

How can I avoid the pop at the end of a file containing a pure frequency?

For a personal project, I need to generate a track that contains a single, pure frequency. My method for this involves generating a single tone using Audacity, and exporting the file. The wave ...
2
votes
2answers
4k views

What does 100Hz 12dB per octave mean?

I have been trying to understand what 100Hz 12dB per octave means in a low pass filter. What does it really mean in full details? Any material can be of help.
2
votes
2answers
134 views

Frequency response of ears when covered with hands [closed]

just as in the title. Anyone know if there is some info on this available. I know its very relative as to how you cover your ears, but an approximate/median graph would be useful to me.
2
votes
1answer
91 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
3answers
568 views

Need help recording ultrasonic frequencies with microphone

I am working on a project; detecting the sounds made by pests in stored grain while eating. I know that the ultrasonic disturbances occur when the pests tear the materials during feeding. I need a ...
2
votes
2answers
119 views

Conditional math (intersection) to join two audio tracks

I do not want the difference. I want the intersection of frequencies. The problem: I have two audio files. One of the files (A) contains the vocals and drums. The other file (B) contains the vocals ...
2
votes
2answers
777 views

Recipe for producing a sub bass that is both loud and rattles shelves?

The best sound I can come up with is not a sine wave, but a triangle wave. The triangle wave creates a very nice upper and lower shelf frequency that you can both hear and feel. The bad thing with ...
2
votes
1answer
280 views

Sound - for the purpose of creating vibrations

What is the best way to distribute noise from more than one source (I'm envisioning a system with many), within a dome, with the ground as its primary target, at optimal frequencies and volumes to ...
2
votes
3answers
212 views

Sound Frequency and Healing

I was wondering if anyone new about the phenomenon of frequency and brain healing. I got a call from someone who is doing an art installation and wants to use the frequency or frequencies which could ...
2
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0answers
1k views

44kHz vs 48kHz for music playback [closed]

I was wondering what's the best setting for typical music playback. Songs are encoded with 16 bit & 44kHz, but my windows 7 sound playback is set to 24 bit / 48kHz (that was the default). Does ...
1
vote
4answers
324 views

Noise Frequency

Im just wondering, as there are lots of kinds noise that creep into our recordings. what are the typical frequencies where noise is mostly present as so I can apply filters etc.. And also, what type ...
1
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3answers
1k views

Why can I hear 120 BPM, but not 2 Hz?

What is the difference between BPM (Beats Per Minute, like what a DJ counts to mix) and Hz (Hertz, like what tuning forks are measured in), other than a factor of 60? Why can I hear a 60 BPM bass ...
1
vote
1answer
33 views

Extract wavelengths or frequencies out of a recorded sound

I have recorded 1 minute of almost silent in woods. there is mostly wind and grass moving sounds. Is there any way to extract wavelength ranges out of it? I only need to know the numbers. I don't want ...
1
vote
2answers
73 views

What property of sound disturbs us?

I am not sure if here is the right place to ask my question. But I will ask. I want to build some kind of sound detector circuit to prevent sleeping baby from disturbances. But, it should detect ...
1
vote
2answers
513 views

Programming a Vectorscope

I'm currently attempting to create a vectorscope that analyzes realtime audio in Javascript using the Web Audio API. During every cycle, the API allows access to the current frequency data and time ...
1
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1answer
2k views

How to shift frequency of whole audio file?

How can I shift the frequency of a whole audio file. So as if there was a sound at 500 Hz and I wanted to shift the audio by 50 Hz, that sound would then be at 550 Hz, and a sound at 1000 Hz would be ...
1
vote
1answer
956 views

How to do frequency or spectral subtraction of two audio tracks?

I want to know how it's possible to substract one audio track from another. Meaning that you cut out the frequency spectrum of a audio file from another. I know how the phase inversion trick used to ...
1
vote
1answer
61 views

What would cause a recording to have a completely symmetric frequency plot?

I'm developing software that receives PCM audio data and converts it to a WAVE file. The audio stream has the following characteristics: 16 bit signed integers 6000 frames sent every 1/8th seconds, ...
1
vote
2answers
295 views

Bubbly/Wet Sounds with FM synthesis

Here's an example: (wet/bubbly sounds all throughout, particularly in first 10 seconds) I'm wondering if anybody knows any tricks on producing these kinds of sounds, ...
1
vote
1answer
107 views

How to calculate our hearing frequency

If we have an object which produces sound with approx. 120 kHz (i.e. bat). And let's say that we record this sound with sample rate of 44,1 kHz (assuming that we do not know about Nyquist theorem). ...
1
vote
2answers
134 views

Maximum frequency of monaural beat frequency?

If I am attempting to make a monaural beat from two frequencies by playing two frequencies with equal amplitudes simultaneously, what is the maximum difference I can have between those two frequencies ...
1
vote
1answer
75 views

What is the true definition for the length of a pulse (impulse-type sounds)?

What defines the length of a pulse (impulse-type sounds)? i.e. snaps, pops, crackles, bangs, bumps, and rattles. The following 4 pulses are all white noise sustained for 37 ms, but each pulse has a ...
1
vote
0answers
111 views

7 band EQ frequencies for full-track playback?

I used to have a Mackie analog mixer, but I've switched over to using a midi controller (Launch Control XL), and I'm not limited by the 5 bands that existed on the Mackie (low cut, 80, 250, 800, 2500, ...
1
vote
3answers
253 views

From simple to advanced mix techniques

In a few words, I know how to mix a fairly simple track (drums, bass, guitar, vocals...). This means that I know how to blend things together because each "instrument" is quite easy to isolate in ...
0
votes
4answers
3k views

Formula for the sound pressure of a pure tone

What is the formula for the sound pressure of a pure tone of 500Hz, ex-pressed as a function of time?
0
votes
1answer
839 views

Frequency distribution graphs in music

I'm quite a newb when it comes to anything audio-related but am playing with programming a spectrum-visualiser. I chunked the signal into 50 bars, each representing another frequency-band. One thing ...
0
votes
2answers
172 views

Feedback loop frequency

Is their an average frequency range of a feedback loop. One created by a speaker and a mic to be slightly more specific.
0
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1answer
44 views

What's the name for the type of x-axis scale used in frequency graphs?

I'm talking about the way the spacing between frequencies typically shrinks as the x-axis increases on frequency graphs. For example, in the graph below, the leftmost (labelled) x-axis interval ...
0
votes
2answers
34 views

How do you change the equalisation of an individual song/audio?

I've been looking for weeks, and I have nowhere else to turn to. I really thought this would be very simple to find, but I'm looking for any type of software that has a 5 band equaliser, that allows ...
0
votes
1answer
74 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 ...
0
votes
1answer
40 views

What frequency / quality for voice clips?

I am looking at making some voice clips for teaching languages. I am using Audacity, but am not sure what settings to use. Many people recommend 44,100Hz for regular music recordings. Is this also the ...
0
votes
1answer
242 views

Audio spectrum analysis: PC Software vs Hardware Spectrum Analyzer

I need to do some audio spectrum analysis (basically, listening to a machine and tell if it is properly calibrated). I will record the sound it makes with a microphone (it sounds differently if it is ...
0
votes
1answer
255 views

Intensity, amplitude, frequency, and perceived loudness

If we were to measure loudness solely as a property of amplitude, then high frequency sounds, which contain high energy, would have the same value as low frequency sounds, which contain low energy. On ...
0
votes
2answers
61 views

How much sound quality will I lose using a headphone which works only with frequencies above 80Hz? [closed]

I don't mean like... voice messages, but, music! Specially blues, metal and rock which tend to have lower pitch tones.