[Harp-L] Re: Which harp mic is most feedback resistant?

[Greg Heumann <greg@xxxxxxxxxxx>]

Hi, John

The output is the amplitude of the output signal. A weak mic might be  
between 0 and 1 volt. A strong mic might be between 0 and 2 volts.  
(Actual voltage levels depend on impedance but you get the idea.

Gain is the relationship between input and output - the "slope" and  
"curve" of the line graphing input level to output level. Two mics  
with identical maximum output levels can still reach that level at  
different levels of input (i.e., how loud you're playing.) Let's say  
mic A's output with 60dB input is "1", with 75dB input is "8", with  
90dB input is "50", and with a howlin' 105db input it reaches its max  
at "100". Mic B's output might be 5, 35, 75 and 100 at the same input  
levels. Mic B is louder for intermediate input levels. Mic B has more  
gain.

/Greg

On Oct 11, 2009, at 2:49 PM, John F. Potts wrote:

> Greg,
>
> Could you explain the difference between a mic's "gain" and a mic's  
> "output?"
>
> Thanks,
>
> JP