Bargain generator

[churchward]

They're wrong if they say that. See my post above.

 

Take a look here where the author talks about 'perceived loudness'

http://www.acousticsbydesign.com/acoustics-blog/perception-vs-reality.htm

Yes it does say that.

 

i.e.

 

http://www.worldpowerfaqs.com/en/categories/sound/60-what-is-the-link-between-db-a-and-lwa

 

"Attention: when the sound level increases by 3dB(A), the sound perceived by the human ear is doubled. When the sound level decreases by 3dB(A), the sound perceived by the human ear is halved."

 

Such is the nature of the internet you can get to read anything being stated as the truth.

 

[Dave_P]

Yes it does say that.

 

i.e.

 

http://www.worldpowerfaqs.com/en/categories/sound/60-what-is-the-link-between-db-a-and-lwa

 

"Attention: when the sound level increases by 3dB(A), the sound perceived by the human ear is doubled. When the sound level decreases by 3dB(A), the sound perceived by the human ear is halved."

 

Such is the nature of the internet you can get to read anything being stated as the truth.

 

As Woteva said, this is wrong. Show's how much you need to treat things posted online with some skepticism. Perception of sound is highly individual anyway. Acoustics is a complex thing. I remember when I had to learn all the equations for an exam a few years ago, mind-boggling stuff.

[WotEver]

Yes it does say that.

 

i.e.

 

http://www.worldpowerfaqs.com/en/categories/sound/60-what-is-the-link-between-db-a-and-lwa

 

"Attention: when the sound level increases by 3dB(A), the sound perceived by the human ear is doubled. When the sound level decreases by 3dB(A), the sound perceived by the human ear is halved."

 

Such is the nature of the internet you can get to read anything being stated as the truth.

 

I think they just have their terminology wrong. If the sound increases by 3dB then the power received at the human ear has doubled. However, the perception will be that it's 'about the same'.

 

What they (your link) are saying is commonly repeated on many sites (too much copy/paste and too little real research) but actual tests with real people shows it to be wrong.

 

Edited to add boldness in an attempt at clarity.

Edited November 13, 2016 by WotEver

[Robbo]

I thought it was a 10db increase was the perceived rate for what we hear as doubling the sound, but a increase in 3db was the doubling the power.

 

 

Edit to add; here we go...

 

Ratio doubling means:
− a power level of +3 dB, or a sound intensity level of +3 dB
− an electric voltage level of +6 dB, or a sound pressure level of +6 dB
− a loudness level of about +10 dB
−10 dB more SPL means 10 times increase in amplifier (electric) power.

 

From; http://www.sengpielaudio.com/calculator-levelchange.htm

Edited November 14, 2016 by Robbo

[WotEver]

I thought it was a 10db increase was the perceived rate for what we hear as doubling the sound, but a increase in 3db was the doubling the power.

That's absolutely correct. A 3dB increase is virtually imperceptible.

[mross]

I'm sure I read that 3dB(A) was the minimum difference detectable by ear?

[WotEver]

I'm sure I read that 3dB(A) was the minimum difference detectable by ear?

Yes, 3dB is barely imperceptible. As Robbo points out, 10dB sounds twice as loud.