sorry,
"of serious DIY people have tried all logic ways to give
a lift to the peak," should be "lift of the dip".
Klas
On 2017-10-11 18:14, Klas [naturerecordists] wrote:
> Marco, Gianni, Bruce and other Gentlemen.
>
> Since Telinga started in 1981, there have been some holy cows to be kille=
d.
>
> The first we met was a dogm that =94the input impedance of a microphone
> amplifier must be the same as the output impedence of the microphone=94.
> Lots of people spend lots of time and money on something they called
> =94impedance matching.=94 The dogm lived on until the end of -90. The top=
ic
> shouldn=B4t have got any attension at all, really, but a manufacturer
> which used a special input transformer put a lot of stress on the
> importance of it.
>
> Another =94expert opinion=94 was that =94you can=B4t record owls with a
> parabola,=94 which meant that parabolas were totally worthless in all
> ways. At Telinga we still get mails occationally about this and Bruce,
> here, just recently had to point out that =94There is no reason why you
> wouldn't be able to record frequencies of 20Hz, it just won't have
> gain.=94 Thanks for that.
>
> Now it seems like a new holy cow is to be born: The Tragedy Of the Bass
> Dip and the Holy Healing Plate.
>
> Yes, when a signal hits an omni in focus of a parabol, gets reflected by
> the parabol and then back to the omni a bit later, there will be a dip
> in the frequency curve. It=B4s true. It=B4s been known for some 100 years
> and hundreds++ of serious DIY people have tried all logic ways to give
> a lift to the peak, including the plate that is now on the agenda.
> But seriously: How many birds have you lost because of a 6db dip at some
> 600 Hz? None, I=B4m sure. The people recording low-freq. mammals will do
> best with HQ shotguns anyway.
> Even regarding it=B4s low importance, it is a difficult problems to solve=
.
> A number of measurements done at Telinga over the years, show that a
> plate flattens out the dip a bit, but that new dips and peaks occur at
> other frequencies in a more or less random way. (Diagrams can be posted
> on request.)
>
> The by far best way to get nice mono sound out of a parabol is to use a
> suitable cardioid, facing inwards into the dish. Heres is a nice
> reference to this subject :
> http://daanhendriks.co.uk/wildlife-nature-sound-recording/telinga-tastic-=
super-close-up-recordings-of-birds-crickets/
>
> The Telinga Twin-Science mic have both types integrated =96 a fine tuned
> cardioid facing inwards to the dish and an omni facing out, for windy
> conditions and for better handling noise. Then one can select the best
> recording by listening in post production.
>
> Klas-G=F6ran Strandberg, Telinga Microphones, 2017-10-11
>
>
>
>
>
> ------------------------------------
> Posted by: Klas<>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>
>
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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