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%I #21 Sep 04 2014 09:35:49
%S 1,2,5,8,9,2,5,4,1,1,7,9,4,1,6,7,2,1,0,4,2,3,9,5,4,1,0,6,3,9,5,8,0,0,
%T 6,0,6,0,9,3,6,1,7,4,0,9,4,6,6,9,3,1,0,6,9,1,0,7,9,2,3,0,1,9,5,2,6,6,
%U 4,7,6,1,5,7,8,2,5,0,2,0,2,4,1,2,1,0,5,0,9,6,6,2,7,5,9,4,6,1,7
%N Decimal expansion of 10th root of 10.
%C This is the ratio of +1 dB (one decibel). Decibels are the principal way how power ratios are measured in electric and electronic engineering, acoustics, meteorology, optics and other engineering branches. Corresponding amplitude (rather than power) ratio is given by the square root of this constant (A011289). - _Stanislav Sykora_, Apr 02 2012
%D Donald Fenna, A Dictionary of Weights, Measures, and Units. Oxford University Press (2002): 61.
%H Ivan Panchenko, <a href="/A011279/b011279.txt">Table of n, a(n) for n = 1..1000</a>
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Decibel">Decibel</a>
%e 1.25892541179416721...
%p Digits:=100; evalf(10^(1/10)); # _Wesley Ivan Hurt_, Mar 26 2014
%t RealDigits[10^(1/10), 10, 100][[1]] (* _Alonso del Arte_, Mar 22 2014 *)
%o (PARI) 10^.1 \\ _Charles R Greathouse IV_, Mar 27 2014
%Y Cf. A011289.
%K nonn,cons
%O 1,2
%A _N. J. A. Sloane_
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