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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: jerryfreak on August 14, 2019, 03:02:59 AM

Title: frequency response of high pass filter
Post by: jerryfreak 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

Title: Re: frequency response of high pass filter
Post by: EmRR on August 14, 2019, 07:01:22 AM

2nd order tells us 12dB/oct

Title: Re: frequency response of high pass filter
Post by: jerryfreak on August 15, 2019, 05:14:02 PM

so -3dB at 80 Hz, -15 dB at 40 Hz, -28 dB at 20 Hz?

Title: Re: frequency response of high pass filter
Post by: EmRR 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.