Raimund Specht wrote:
> --- In Walter Knapp <> wrot=
e:
>
>>I'd actually like to see a all in one package so the laptop is not
>>needed in the field. I know that's going to eat more power, but
>
> probably
>
>>less than a laptop plus the ultrasoundgate.
>>
>>If it was cheaper and was all in one, I'd be tempted.
>
> Sure, but it would be impossible to manufacture such a device at
> reasonable costs. The potential market is too limited.
Judging by the rosy pictures painted all the time about solid state
devices I only have to wait a couple years and they will be handing them
out as door prizes at the bank ;-)
I understand how they end up costing that much. It does not change that
there is a limited market partially because of the cost.
> Recently, we measured the frequency response of the MKH 800 for
> frequencies of up to 125 kHz (the official plot supplied by
> Sennheiser ends at 50 kHz):
> www.ultrasoundgate.com/microphones.htm#MKH800
>
> To be honest, the extended frequency range of the MKH800 is achieved
> to some extend by it's integrated compensation filter. Therefore,
> the inherent noise floor is increased at frequencies beyond about 45
> kHz. Also, the directionality increases at higher frequencies. The
> official prices specified by Sennheiser are the same for both the
> MKH 80 and the MKH 800 (but there might be differences at eBay).
There is considerable difference on eBay. And MKH-800's are less common.
I've read a little bit of the various stuff sennheiser said about the
problems of going from the MKH-80 to the MKH-800. Sounds like the high
frequency range stuff like that is going to tend toward the expensive at
least until they can do more of the design work with computer modeling.
And modeling all the surfaces in the mic housing is going to take a bit
of work too.
> Another, much cheaper solution would the electret microphone, that
> employs a capsule by Emkay/Knowles. Unfortunately it's frequency
> response is less flat (there are some similarities to the properties
> of a parabola ;-)).
Yes, I know there is the electret solution. I could build the mic going
that way. And if I got into this I'd probably go that way at least at
first. Or go with a good test mic. I may go with one of the competing
bat units that only records a few seconds. Or wait for them to add more
memory. Hard to justify for the limited fun I could get out of it.
I wonder what it's frequency response would be combined with a
parabola. The jaggies also have a look of some of the things sennheiser
dealt with making the MKH-800. All those reflections off tiny surfaces.
Walt
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