[ericj]

I'm considering building a jig to measure the response of headphones. To verify what my ears hear when i mod headphones and maybe to help me design some of my own.

I already bought the Dayton calibrated mic from Parts Express that is basically the Behringer mic plus a calibration chart. I still have my E-Mu 1616M working on a desktop windows 7 machine. I got that for speaker projects but it'll work for headphones too.

Might build something like this rig:

https://homebrewheadphones.com/design/testing-your-design/

I have 3d printers and could probably print some semblance of a human ear out of TPU or "Soft PLA" too.

 

[Redcarmoose]

 

[ericj]

Ahh, the world's finest rubber micrometer!

 

[BBGirl]

tinnitus ?

 

[ericj]

A friend helped me slap this together tonight. Didn't take long.

It's a little wide as heads go but whatever. I'm sure i will alter the opening for the mic a bit more.

Mic is the Parts Express / Dayton measurement mic, which is a Behringer measurement mic that comes with a calibration chart. I'll plug it right into my E-MU 1616M and run probably REW.

Yes that's a Presonus HD7 aka Superlux HD-681B with a strap from a wrecked K270 while i wait for a replacement superlux strap from china. I hope i can improve on the standard mods for the HD-681b, just because i feel like it.

 

[gumisb]

Conception is very similar to yours. I made ear canal from wine cork with cone shape and angled microphone.

 

[flyte3333]

Hi @ericj @gumisb I see your mics are angled.

Does that introduce any issues? What about with headphones that have angled drivers?

If you flip headphones around to measure other earcup but mic stays at same angle , will left and right headphones measurements be different due to mic angle?

Or not concerned because of omni directional properties?

 

[gumisb]

The measurement will be different so flip of microphone is needed. That's why my rig has two eyes and ears to made it easy In real world after initial measurement of both drivers I just use one side.

 

[flyte3333]

The measurement will be different so flip of microphone is needed. That's why my rig has two eyes and ears to made it easy In real world after initial measurement of both drivers I just use one side.

Thanks! And what is the purpose of having the microphone at an angle ?

 

[gumisb]

Look at the picture in second post. Eardrum is angled vs ear canal. From my perspective simplified model of human ear need to have cone ear canal and angled mic. Outer ear creates harmonics making things complicated