Latest Thread Images

Ultimate Ears Triple Fi 10 Thread

Mar 30, 2008 at 8:19 PM Post #122 of 9,692
Quote:

Originally Posted by Al4x /img/forum/go_quote.gif
no, it is logarithmic


Sorry must have phrased it wrongly. 10db increase = double the perceived increase in volume. Maybe it's because I don't know the terminology but 10x louder sounded like 10x the volume which isn't true.
 
Mar 30, 2008 at 9:09 PM Post #123 of 9,692
Quote:

Originally Posted by spyder187 /img/forum/go_quote.gif
Sorry must have phrased it wrongly. 10db increase = double the perceived increase in volume. Maybe it's because I don't know the terminology but 10x louder sounded like 10x the volume which isn't true.



You're perfectly right Spyder, an increase of 10dBSPL is psychoacustically perceived by the mayority of listeners as doubling the loudness subjectively.

Rgrds
 
Mar 30, 2008 at 9:48 PM Post #125 of 9,692
Quote:

Originally Posted by Al4x /img/forum/go_quote.gif
i thought a 10 increase in dB = 10x louder

sorry not louder but stronger



No worries, this thing of the dBs, how they relate to the real changes in sound pressure level, and how our ear-brain really hears that, is always confusing. I recommend you to read the Wiki's decibel article. I also recommend you reading the definitions of sone which is the unit used to measure subjectively perceived loudness and phon the unit used for perceived loudness but for pure tones.

Rgrds
 
Mar 30, 2008 at 10:17 PM Post #126 of 9,692
i take rms removes - values because of wave form because pressure changes are +/- like a diaphagm going out/in
dB is a pure pressure change measure (SI) that better quantifies pressure via a log scale because the range is high
and a phon compensates for frequency and so gives a loudness magnitude that we interpret (so not SI)
and the sone was just made to fit with the dB scale (as assigning value to water triple point and absolute 0 to give a scale)

think im done with edits
i may be off tho
 
Mar 30, 2008 at 11:11 PM Post #128 of 9,692
Quote:

Originally Posted by antonyfirst /img/forum/go_quote.gif
+6 dB = double volume


Define what you mean for volume. Getting +3dB means you have to feed the double of power. +6dB means you're using the double of voltage (that's why balanced connections provide +6dB). But regarding human perception and how many decibels you need to feel that something is sounding double the loud, "powerful", "strong" or whatever you want to name it, the sound pressure level required is 10dB more. I'm possitive about it
wink.gif

You could be meaning that +6dB is the same than having double the pressure, so to say that a SPL of 50 pascals (Pa) is almost 128dB and 100 Pa is almost 134dB. But don't forget our hearing is not lineal and doubling the pressure in absolute terms doesn't mean hearing it double louder.

Rgrds
 
Mar 30, 2008 at 11:52 PM Post #130 of 9,692
I'm saying that in Electronics +6dB is double amplitude, so here 6dB is double voltage. But you bring out an interesting topic about non linearity of hearing. Can you tell me more?
 
Mar 30, 2008 at 11:54 PM Post #131 of 9,692
Quote:

Originally Posted by antonyfirst /img/forum/go_quote.gif
I'm saying that in Electronics +6dB is double amplitude, so here 6dB is double voltage. But you bring out an interesting topic about non linearity of hearing. Can you tell me more?


I am not sure that all headphone drivers are equally linear in relation to low vs high volumes.
 
Mar 31, 2008 at 12:47 AM Post #134 of 9,692
Mar 31, 2008 at 2:56 AM Post #135 of 9,692
Quote:

Originally Posted by dallan /img/forum/go_quote.gif
I was into amateur radio for years and to achieve a 3db increase always meant you had to double your power output or use a directional antenna(the cheaper smarter way).


That's correct. Double power (Watts) = +3db.

I haven't learned about increase in voltage translating to the amplitude stuff so I can't comment on that.
 
You must log in or register to reply here.

Users who are viewing this thread

Total: 3 (members: 0, guests: 3)
Back
Top