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Ultimate Ears Triple Fi 10 Appreciation Thread - Page 9

post #121 of 8045
3/30/08 at 4:56pm
no, it is logarithmic
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post #122 of 8045
3/30/08 at 5:19pm
Quote:
Originally Posted by Al4x View Post
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.
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post #123 of 8045
3/30/08 at 6:09pm
Quote:
Originally Posted by spyder187 View Post
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
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post #124 of 8045
3/30/08 at 6:16pm
i thought a 10 increase in dB = 10x louder

sorry not louder but stronger
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post #125 of 8045
3/30/08 at 6:48pm
Quote:
Originally Posted by Al4x View Post
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
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post #126 of 8045
3/30/08 at 7:17pm
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
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post #127 of 8045
3/30/08 at 7:59pm
+6 dB = double volume
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post #128 of 8045
3/30/08 at 8:11pm
Quote:
Originally Posted by antonyfirst View Post
+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
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
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post #129 of 8045
3/30/08 at 8:16pm
i think i understand 100x more than i did an hour ago, luckily i did maths and physics at a level!
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post #130 of 8045
3/30/08 at 8:52pm
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?
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post #131 of 8045
3/30/08 at 8:54pm
Quote:
Originally Posted by antonyfirst View Post
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.
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post #132 of 8045
3/30/08 at 9:09pm
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).
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post #133 of 8045
3/30/08 at 9:33pm
Sorry I don't want to break the discussion about db.

I was just wondering if M-Audio IE-40 is exactly the same as TF10?

M-AUDIO - IE-40 - High-Definition Professional Reference Earphones with Triple-Driver Technology
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post #134 of 8045
3/30/08 at 9:47pm
Quote:
Originally Posted by ch28kid View Post
Sorry I don't want to break the discussion about db.

I was just wondering if M-Audio IE-40 is exactly the same as TF10?

M-AUDIO - IE-40 - High-Definition Professional Reference Earphones with Triple-Driver Technology
There's no confirmation to this. A guy bought a pair and got burned with rubbish sound. He most likely got a lemon, but we aren't sure of it.
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post #135 of 8045
3/30/08 at 11:56pm
Quote:
Originally Posted by dallan View Post
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.
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