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Author Topic: frequency response of high pass filter  (Read 628 times)

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Offline jerryfreak

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frequency response of high pass filter
« on: August 14, 2019, 03:02:59 AM »
the DPA d:vice has an "80 Hz second order highpass filter", thats all the spec given, no slope

from what i gather, 80 Hz is where it should be 3 dB down. does "second order" tell us anything about the slope? trying to model with graphic EQ in soundforge to hear what it should sound like

Offline EmRR

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Re: frequency response of high pass filter
« Reply #1 on: August 14, 2019, 07:01:22 AM »
2nd order tells us 12dB/oct
Mics: DPA 4060 w/MPS 6030 PSU/DAD6001/DAD4099, Neumann KM 131, KMR 81i, Oktava MK 012, Sennheiser MKH 105, MKH 20, MKH 30, MKH 40, MKH 800 TWIN, lots of other studio appropriate choices
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Offline jerryfreak

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Re: frequency response of high pass filter
« Reply #2 on: August 15, 2019, 05:14:02 PM »
so -3dB at 80 Hz, -15 dB at 40 Hz, -28 dB at 20 Hz?

Offline EmRR

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Re: frequency response of high pass filter
« Reply #3 on: August 15, 2019, 09:53:27 PM »
Roughly.  There are some other factors affecting initial slope that might render slight differences, but shouldn’t be much. 
Mics: DPA 4060 w/MPS 6030 PSU/DAD6001/DAD4099, Neumann KM 131, KMR 81i, Oktava MK 012, Sennheiser MKH 105, MKH 20, MKH 30, MKH 40, MKH 800 TWIN, lots of other studio appropriate choices
Recorders: Zoom F8n, Sony MZ-R50, portable MOTU based multitrack DAW for client work

 

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