Hey PhD in physical acoustics here, I'm a nerd sorry. Double the power = 3 dB, double the amplitude = 6 dB. Two amps (in phase) double amplitude so +6 dB. Also by moving double the distance away from a cylindrical source (an amp or drums in a room with a floor and a roof) the 1/sqrt(2) reduction in amplitude gives a 1/2 reduction in power making that -3 dB. If it was a spherical source then it would be 1/r spreading and that would give -6 dB. Excellent video though just nit picking.
+3dB for when they are two different instruments playing or unrelated (that is mathematical correlation = 0) but yeah if it's exactly the same sound source for both amps it's +6dB
You should mention that there is a conductive peak at around 3khz to 5khz because the outer ear and ear canal are shaped to natural amplify the "airy" S and T sounds (in order to better hear speech). That peak causes those frequencies to be damaged first (as long at they're present in the sound source)
Generally it makes sense to think different frequencies having different levels. The standard meter can only aproximate to a one single number when in reality there is different decibels for different frequency zones. Some frequencies are more dangerous than others. Frequency matters! For example if you happen to expose your self to a single 100db sine wave (say 160hz) it is hasta la vista for your ears very soon. In normal - even loud music - the volumes are spread over wide frequency range thus single frequencies being not even close that loud.
@@OscarPoblete The right direction for you is in your self. Most importantly you must form inner picture of what you already understand and then form the right set of question(s).The right set of questions quides you in this topic as well in any other topic because the information is scattered across internet so that it is better to form your personal knowledge before following blindly some one other's. I would first find out how a plucked string gets its tone. Here is the starter for plucked string: ruclips.net/video/T1bBgGgoncY/видео.html And this is the same business starting to add on it. ruclips.net/video/0Rfushee0U/видео.html So you need to relax ,sit back and get something out of them and start to build your questions base. You cannot understand deep meaning of frequencies things without gettin good grasp of string modes which those videos discuss.
that's unture, sound waves are pressure waves in the air. the pressure is both what you hear, and what does damage. frequency matters in terms of which hair cells will be damaged but you are mistaken about the way SPL works... the energy doesn't "spread over wide frequency range" it carries just as much energy and pressure. Go look at an oscilloscope and see the way sound waves are "shaped". It's carried along a complex waveform, a single complex waveform. It's not magically affect the air where and how it chooses to. Makes no sense...
@@gardevoirdude7493 Oscilloscope is tool to lock in to some constant fundamental frequency wave. It does not make sense to view complex signal with oscilloscope. (Other than verify that signal is present). We are talking about sound as complex continuous signal which can be visually observed with any audio editing software. We talk also about Fletcher-Munson curves. What you get with db meter is one number. You dont need to know more about it to figure out it cannot be right. If you believe in one number I would say you are in danger. From natural sound sources on a low very strong frequency are riding less powerful higher harmonics. It about the physics of materials vibrating when given initial impulse i.e exiter. What ever sounds are produced - starting from human humming to knocking drum membranes - after the initial exitation the wave starts to stabilize and then there are harmonics evolving and decaying and they are decaying in different rates contributing to perceived distinct "tone" or "timbre". It is very simple thing. I really would not like to be anywhere near where is 1000 hz 100db single pure tone occuring. But I could take 100hz for a while but still it would create unpleasant stress quite fast. Just test your self:generate different single sine waves with function generator and check with db meter what you cant take.
@@KetogenicGuitars fine... look at a signal in a spectrogram not an oscilloscope... makes no difference lol. If a volcano were to erupt and emmit a massive pressure wave of 180db, that wave form would have high and low frequency information which would be spread across the entire range of human hearing (and past it in both directions). That doesn't mean it's carrying any less energy. Think about it like this, an oscilloscope is showing you the waveform in the way it travels through the air, a spectrogram takes the information about an audio signal and presents it in a way that we can much more easily understand and identify. All the information about an audio signal is present in an oscilloscope reading depending on how it's set. Also frequencies aren't "less" or "more" "powerful" than one another depending on their frequency. If both are disturbing the air equally both are carrying the same amount of energy. it's a function of how pressure waves move through air. That's why SPL under water is so different from through air, it has much more to do with the atoms in the medium of transportation that the wave itself. I don't know how to better explain it.
If the two amps with 90db SPL output the exact same sound waves, won't the measured SPL then be at 96db (provided the SPL meter is positioned at the same distance from both etc.)? Wouldn't the 93db SPL be measured with two sources that would have no common but evenly distributed frequency and phase response?
See below: original comment "A doubling of linear sound pressure (from, say 2 kPa to 4kPa) would increase the dB spl reading 3dB." is incorrect-doubling the amplitude yields 6dB increase.
@@ElectricalAudioOfficial Sorry but that isn't right. dB's are a power rating 10 log 2 is 3 dB yes but that's twice the power not amplitude. Doubling the sound pressure amplitude is 10 log 2^2 which is 20 log 2 or 6 dB. Power is proportional to amplitude squared.
Zut alors! Je parle francais tres mal. Mais, c'ette une beau video. Is "video" masculine? Nevermind. Any vids on ear fatigue from mixing would help the kids. And probably save a few engineers from having to explain that 9hrs of loud e-min without a break wear out that frequency in your ears and cause one to boost levels and EQs... Bon soir.
Hey PhD in physical acoustics here, I'm a nerd sorry. Double the power = 3 dB, double the amplitude = 6 dB. Two amps (in phase) double amplitude so +6 dB. Also by moving double the distance away from a cylindrical source (an amp or drums in a room with a floor and a roof) the 1/sqrt(2) reduction in amplitude gives a 1/2 reduction in power making that -3 dB. If it was a spherical source then it would be 1/r spreading and that would give -6 dB. Excellent video though just nit picking.
This is probably the best video comment we've received. Thanks for clarifying this!
Thank you @vrs600! I seem to mix up my 3s and my 6s a lot in this video :)
Can we be friends?
+3dB for when they are two different instruments playing or unrelated (that is mathematical correlation = 0)
but yeah if it's exactly the same sound source for both amps it's +6dB
Holy shit, I was not expecting Steve’s rock moves. Haven’t laughed that hard all day. Thanks!
I want to see all the B Roll footage of Steve embracing the full-on rock persona.
Laughed?
Haha first time I see Steve with a normal guitar strap!! Love this videos!!
You should mention that there is a conductive peak at around 3khz to 5khz because the outer ear and ear canal are shaped to natural amplify the "airy" S and T sounds (in order to better hear speech). That peak causes those frequencies to be damaged first (as long at they're present in the sound source)
Steve is my spirit animal
Lmao. Educational and fun! I never thought of Steve as a physical comedian but he should do more of this stuff!
lol these vids are great especially the editing. deserves way more subs. please keep making them.
"This is an original composition called 'E Minor and F.'" _proceeds to play a solid 25% of Shellac's catalogue_
5:03 -I have been exposed to my first AI assisted tutorial and no one prevented me! However, prevention is the best course of action!! 🍀
What volume do you usually mix at? I've always had an issue with that. I wanna feel it, damn it!
Gregoir and Studio B! ❤️❤️❤️
Generally it makes sense to think different frequencies having different levels. The standard meter can only aproximate to a one single number when in reality there is different decibels for different frequency zones. Some frequencies are more dangerous than others. Frequency matters! For example if you happen to expose your self to a single 100db sine wave (say 160hz) it is hasta la vista for your ears very soon. In normal - even loud music - the volumes are spread over wide frequency range thus single frequencies being not even close that loud.
Hey! I've been lokking for more into this topic. Do you happen to have a source where I could learn more? Thanks in advance!
@@OscarPoblete The right direction for you is in your self. Most importantly you must form inner picture of what you already understand and then form the right set of question(s).The right set of questions quides you in this topic as well in any other topic because the information is scattered across internet so that it is better to form your personal knowledge before following blindly some one other's. I would first find out how a plucked string gets its tone. Here is the starter for plucked string:
ruclips.net/video/T1bBgGgoncY/видео.html
And this is the same business starting to add on it.
ruclips.net/video/0Rfushee0U/видео.html
So you need to relax ,sit back and get something out of them and start to build your questions base. You cannot understand deep meaning of frequencies things without gettin good grasp of string modes which those videos discuss.
that's unture, sound waves are pressure waves in the air. the pressure is both what you hear, and what does damage. frequency matters in terms of which hair cells will be damaged but you are mistaken about the way SPL works... the energy doesn't "spread over wide frequency range" it carries just as much energy and pressure. Go look at an oscilloscope and see the way sound waves are "shaped". It's carried along a complex waveform, a single complex waveform. It's not magically affect the air where and how it chooses to. Makes no sense...
@@gardevoirdude7493 Oscilloscope is tool to lock in to some constant fundamental frequency wave. It does not make sense to view complex signal with oscilloscope. (Other than verify that signal is present). We are talking about sound as complex continuous signal which can be visually observed with any audio editing software. We talk also about Fletcher-Munson curves. What you get with db meter is one number. You dont need to know more about it to figure out it cannot be right. If you believe in one number I would say you are in danger. From natural sound sources on a low very strong frequency are riding less powerful higher harmonics. It about the physics of materials vibrating when given initial impulse i.e exiter. What ever sounds are produced - starting from human humming to knocking drum membranes - after the initial exitation the wave starts to stabilize and then there are harmonics evolving and decaying and they are decaying in different rates contributing to perceived distinct "tone" or "timbre". It is very simple thing. I really would not like to be anywhere near where is 1000 hz 100db single pure tone occuring.
But I could take 100hz for a while but still it would create unpleasant stress quite fast.
Just test your self:generate different single sine waves with function generator and check with db meter what you cant take.
@@KetogenicGuitars fine... look at a signal in a spectrogram not an oscilloscope... makes no difference lol. If a volcano were to erupt and emmit a massive pressure wave of 180db, that wave form would have high and low frequency information which would be spread across the entire range of human hearing (and past it in both directions). That doesn't mean it's carrying any less energy. Think about it like this, an oscilloscope is showing you the waveform in the way it travels through the air, a spectrogram takes the information about an audio signal and presents it in a way that we can much more easily understand and identify. All the information about an audio signal is present in an oscilloscope reading depending on how it's set. Also frequencies aren't "less" or "more" "powerful" than one another depending on their frequency. If both are disturbing the air equally both are carrying the same amount of energy. it's a function of how pressure waves move through air. That's why SPL under water is so different from through air, it has much more to do with the atoms in the medium of transportation that the wave itself. I don't know how to better explain it.
Ear muffs are great for new fathers and mothers
What a great sounding guitar and amp. Direct into that amp?? must be that tasty aluminum...
I'm so lucky I haven't damaged my ears this is a good warning
WHAT?
@@ErickCthat joke is so old it can vote
@@christsatanatl : I'd argue it's so old that it's statistically more likely to vote.
very informative thanks for this!
Old 805’s ❤
Love this video
Educational and comedy gold
Nice Kick!
How much to get Steve to play drums in my band?
this video is a secret gem LMAO you guys are funny
5:13 chart: sound-pressure - exposure time
5:29 136dB snare drum
Woah woah Stevie ray albini shreds !!!!
Merci, très bien fait et vous avez même pas d’accent de Chicago!
Ha! I thought noise cancelling headphones might work as hearing protection, but doesn't the Eustachian tube counteracts is functionality?
Is Steven wearing hearing protection?
i love steve
Hear, Hear
The best muff is a Big Muff and the best coffee is made with a raging Harmonic Percolator.
6:30 how abouth the wax earplugs?
Snare sounds kinda good tho
If the two amps with 90db SPL output the exact same sound waves, won't the measured SPL then be at 96db (provided the SPL meter is positioned at the same distance from both etc.)?
Wouldn't the 93db SPL be measured with two sources that would have no common but evenly distributed frequency and phase response?
See below: original comment "A doubling of linear sound pressure (from, say 2 kPa to 4kPa) would increase the dB spl reading 3dB." is incorrect-doubling the amplitude yields 6dB increase.
@@ElectricalAudioOfficial 2kPa = 160dB, 4kPa = 166 dB
- Sum of 2 sound sources (uncorrelated eg. Random phase ~Violin and trumpet)
dB1 + dB2 = 10 × log10(10^(dB1/10) + 10^(dB2/10) + ... 10^(dBn/10))
100dB SPL + 100dB SPL = 10 × log10(10^(100/10) + 10^(100/10) ) = 103dB SPL
- Sum of 2 sound sources (correlated eg. Same phase ~2 Violins) - Not real life
dB1 + dB2 = 20 × log10(10^(dB1/20) + 10^(dB2/20) + ... 10^(dBn/20))
100dB SPL + 100dB SPL = 20 × log10(10^(100/20) + 10^(100/20) ) = 106dB SPL
@@ElectricalAudioOfficial Sorry but that isn't right. dB's are a power rating 10 log 2 is 3 dB yes but that's twice the power not amplitude. Doubling the sound pressure amplitude is 10 log 2^2 which is 20 log 2 or 6 dB. Power is proportional to amplitude squared.
@@vsr600 Right, for us lesser nerds: only power is 10log(x/y), amplitude (voltage, etc.) is always 20log(x/y). Thanks for the clarification!
How can you measure loudness in headphones? I guess just whatever the loudness reading is?
but no even then, the volume on your computer output would affect how loud the signal coming thru the headphones are..
Do the Swans ring a bell?
I can do a Beavis or Butthead to the point we're people look around the room for one of them but I need to work on this cat.
What?
wtf didn't think snare was that loud
Maybe that's why they call it percussion
Steve, it’s Parrr-A-Di-Dul, ffs! 😂
*W H A T?*
Zut alors! Je parle francais tres mal. Mais, c'ette une beau video.
Is "video" masculine? Nevermind.
Any vids on ear fatigue from mixing would help the kids. And probably save a few engineers from having to explain that 9hrs of loud e-min without a break wear out that frequency in your ears and cause one to boost levels and EQs... Bon soir.
il a son joueur de huit pistes vraiment bruyant
Whatever that features Steave man.
damn, this one was very hard to like. I kind of get those tree up there
Never knew Steve to be a goofy dude. I don’t know why he gets such a bad wrap from some people.
Steve looks like punk Ben Shapiro
😆😆😆😆
I bet he's not even French
I bet you really must have a boring life...
@@jas_bataille ok