Decibels (dB) In Audio | The 5 Things You NEED To Know...

Nicely done! Thank you! I think I have a quick correction though. The graph used to explain log is actually an exponential curve, right? Log is flipped. Humans perceive loudness logorythnically where slight increases are perceived louder until they "round off" the louder the volume. 120db to 130db is barely perceived, whereas 0db to 5db is perceived as a large jump. Correct me if I'm wrong about the graph

Great explanation. Thank you for not holding back on the math.

I wish I could like this video twice.

Thank you

im lose bru idk what your talking about

The best video about decibels and the best creator for audio tecqniques. Thank you!

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

OMG - when someone asks you how loud an amphitheater is: 2000 ft away. And you give them this you are quickly laughed out of the room. City planning commissions need explanations to complicate process models. This explanation will take almost any million dollar sound study.

As much as I need this, it sounds like a language I can’t grasp to understand.

I want to ask how do I record a coinbent sound inside my home? My guess is -40 dB!!! With the trivial apps I got 26 dB but it's not quite there. Let me know and very urgent for me. Thank you very much.

Can someone help me please. I work in a noisy engine factory in a particular area where the dB is below the point where it’s not compulsory to wear ear protection. However, I choose to wear earplugs because I get sharp earaches during the shift and I can feel my hearing is detrimentally effected after a shift. My employer believes that because the working environment is below the dB legal limits for wearing ear protection, my hearing can’t be effected, but I believe that it’s the frequencies of sound can cause damage, even though it below the dB legal limit. Certain frequencies can be within the ‘safe’ threshold, but can still damage your hearing. Frequencies are vibrations in the air and have different strengths of vibration, causing damage to the ears.

Very nice explanation. 😊

Is ZERO db no sound or not perceivable by the human ear?

THANK YOU SO MUCH FOR THESE VIDEOS!

Well done Sir

Whatever man. Thank god this knowledge doesn't affect my ability to move a fader, because I have no interest in trying to comprehend all those letters and numbers. I'll stick to trusting my ears

Finally, someone explains clearly why the number 20 is used. I've been baffled by that for so long... I'm gaining so much from your wonderful videos – thank you again, and sorry if I'm spamming your notifications. I'm working through your back catalogue :)

"....the drums are 120 dBs" is not an incomplete statement if you're talking about sound pressure levels, where 120 dBs is referenced to 0 dBs SPL, or absolute quiet.
I know that you know this, I'm just clearing it up for other viewers.
Best regards,
Bill P.

Well? The decibel system is not understood by 99% of us. What about the weighting system? Ay yay…. I’m just gonna mix another record. It’s too confusing and honestly has no impact on those of us recording and mixing recordings. Think and feel MUSIC. Not decibels.
IMHO. But hey, if that’s your interest go for it

thanks for this vid. Will review closely.

Hellow! My power amp has 4500w x2, what out put level can I set when I connect two mid range speaker

hello! I have a quastion!
Bel = log_10(power2/power1)
dB = 1/10 * Bel
but why dB is 10*log_10(power2/power1) ???
shouldn't dB be 1/10 * log_10(power2/power1) ??? 😭

I never understood minus db's

Excellent explanation on a totally misunderstood subject. Now for the total rabbit hole- Explaining dBspl weighting and that humans can actually hear below 0dBspl at certain frequencies as the definition is at 1kHz. some people can hear 3.2kHz at -5dBspl.

Thankyou. while I have done lots of audio for theatre etc, I'm also quite involved in radio. I mean on the radio frequency as in the what the transmitter antenna and receiver. these to although not audio but at radio frequencies is also expressed in decibels. your explanation applies quite well since the ratios are the same concept to radio frequencies. to increase my signal by 10db I increase transmitter power by 10 times. using AM radios with any gain compensation turned off a 10db increase of the radio signal will as I say without AGC or automatic gain control to compensate for changes in signal strenth, will also make a 10db increase in audio volume.

interesting how the bell or decibel can be and is often applied in other things other than audio.

This is actual information, subbed.

I like Paul from PS Audio, but a 7m video is primarily good vibes, history and some information, and yet I see many people Commenting "wow so much useful information this was amazing".

But what is negative db, what does it mean when compared to an expensive speaker that has 90db, but another expensive speaker has -24db?

Very technical and learned a lot from you sir..

it"s hard to believe when I see it that a rock band produce less db than a simple car horn... I never thought

Threshold of feeling? :)

I found out that the decibel is much MORE confusing than I previously thought!

ok so this went way over my head. I'm very sensitive to high pitches. I'm looking for a ear plug that will take them out or lower them significantly. As well as lower overall sound. I can't be in the same room with a vacuum cleaner and when I watch tv it has to be on 25 or lower to not hurt my ears. Any suggestions for products? I suffer from migraines and seizures and very sound sensitive. Bass doesn't seem to hurt as bad but still the overall volume of it has to be low.

excellent - articulate and organized and clear

In sound, 1db gain is the smallest change in sound you can hear, 3db is only a slight change in volume but takes twice the power ( amps and speakers ) to produce.
It is also dependent on distance, twice the distance half the volume ( I don't know the readings of that, but aprox. half the power, -3db )

Great.Congratulations

@Audio University, I've recently discovered the channel, found lots of interesting videos and have subscribed.

Watching this one was another eye opener but I can't quite get my head around how you convert a dBfs value to the audio device's voltage out if 0dB = 2V. Using the voltage & sound pressure formulae, would dB be the dBfs value below zero and would value 1 or value 2 be 2v while the other gives the output voltage?

Thanks

love these videos

wonderful video...!!
Thank you...

My family is Italian, they're between Jack Hammer and Jet Engine.

Every 3db of gain requires doubling the power in audio. That's why to get 120db of volume out of a pa system requires huge power and many more drivers compared to say 110 db. Both are insanely loud though.

3 db is an audible sound difference hearable to the human ear.

I do hope that the many people who use the dB, without being aware of what it actually is, view this well presented video.

I just wanna thank you for making these videos, I’m new in this complicated business and was recently volunteering at a gig in my town. I binged your channel before the event, and now I manage setup and tear down at my second event this weekend. I think you’ve managed to squeeze years of experience and classes into days, amazing!