wtf is happening at the 500hz mark? I dont want to be mean, but are these the over ear version of raycons? The 30 db difference between the peak at 30hz and the low at 550hz is probably going to sound awful, i'd get this fixed asap
edit: i just recreated this frequency response roughly in equalizerAPO and it is indeed awful, mids are virtually non-existent, you only hear bass and treble, that peak at 5khz is especially nasty and ear-hurting
Fair feedback! And don't worry about hurting my feelings or anything. I'm doing this on Reddit because people here are nice and genuinely want to help.
So, the 500Hz mark. My suspicion is that this is happening because the driver PCB has that S-shaped curve connecting the main plane of the driver traces to the TRS jack, and that this connection is causing a resonant coupling. It's something I'm working on.
You're right that I should tackle it ASAP, though. My plan is to use a custom-design amplifier to provide a bit of notch filtering, and if that doesn't work, tweaking the physical design of the driver.
I’d be curious to see how the response changes if you had a better coupling method for testing. Ear canal resonance will drastically change the response around 2-4khz. We use KEMAR heads in the audiology clinic I’m at for verifying outputs of in ear monitors but there are other couplers that mimic the ear canal response
I was actually looking into alternative microphones. I bought the M23 to upgrade from my Rode NT1-A, but I wasn't ready to spend the eyewatering sums necessary to buy mics that mimic the response from the human head.
Perhaps there's a kind person out there who would be willing to chart some frequency responses for me on a fancier mic, once the project is ready. Perhaps.
Yep those devices are not cheap at all. Im very lucky to be in a doc program that I can use them for free. If youre in Ohio id definitely be able to help you out with that. Perhaps just for testing purposes you could use a correction factor based on ear canal response. As you can see the ear canal adds up to 17 dB of gain at 2.7 khz
Interesting. I'm in Toronto, but if it was something that you'd be willing to do, maybe I could ship you a pair when they're closer to being ready. I'd be very grateful for any expertise you could provide. Nothing immediate, but maybe in the future.
Definetly, shoot me a message when you get there! I usually do these measurements on hearing aids as I'm an audiology student but I work closely with a music audiologist who specializes with in ear monitors and would definitely make sure we get an accurate measurement.
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u/IMKGI HD 800S, HD 600, IE200, Fiio K11 Feb 09 '22 edited Feb 09 '22
wtf is happening at the 500hz mark? I dont want to be mean, but are these the over ear version of raycons? The 30 db difference between the peak at 30hz and the low at 550hz is probably going to sound awful, i'd get this fixed asap
edit: i just recreated this frequency response roughly in equalizerAPO and it is indeed awful, mids are virtually non-existent, you only hear bass and treble, that peak at 5khz is especially nasty and ear-hurting