[jaakkopasanen]

Here are my graphs

Definitely something wrong if you get that zigzag curve. Iirc someone had something similar earlier in the thread but don't remember the solution from the top of my head

 

[Xam198]

Whan you talk about zizag, can you precise wich ones ? The very small ones, oscillating around the curves ?

 

[reter]

Definitely something wrong if you get that zigzag curve. Iirc someone had something similar earlier in the thread but don't remember the solution from the top of my head

@jaakkopasanen what about mine? i got 2db headroom, why in the high frequency the graph goes very down and does zigzag?

@Xam198 download audacity and look at your headphone.wav, also if you can, try lowering the headphones volume and raise the mics or viceversa, try multiple times until you get a good sinusoid

The sinusoid should be pretty perfect, this is my test 3:

 

[castleofargh]

Whan you talk about zizag, can you precise wich ones ? The very small ones, oscillating around the curves ?

The spring like shape from 500Hz to 5000Hz. Chaos is fine, but this isn't chaos and I don't know what would cause it.

 

[Xam198]

The spring like shape from 500Hz to 5000Hz. Chaos is fine, but this isn't chaos and I don't know what would cause it.

Perhaps the "humm" like a loop groud that i can ear : it's very slight, but if i increase the volume i can hear it.

 

[Xam198]

I'm getting loosed, i've got now a strange sound at the end of the sinusoid while recording, sort of "qssssqsqs" . But the file sweep-6.15s-48000Hz-32bit-2.93Hz-24000Hz isn't corrupted.

 

[morgin]

@Xam198 I had I think what looks like the same problem. Here are my comments and fix. Hope it works.

Do you put your volume and gain on loud when doing the measurements?

 

[jaakkopasanen]

@jaakkopasanen what about mine? i got 2db headroom, why in the high frequency the graph goes very down and does zigzag?

@Xam198 download audacity and look at your headphone.wav, also if you can, try lowering the headphones volume and raise the mics or viceversa, try multiple times until you get a good sinusoid

The sinusoid should be pretty perfect, this is my test 3:

That stuff above 10 kHz is more or less expected.

 

[morgin]

This is a long shot but worth asking. I understand if I don’t get a reply for this and not really expecting one as it’s not a medical forum

But my mum has sudden hearing loss. She doesn’t listen to loud tv or headphones and doesn’t work near loud equipment. There’s is tinnitus too I believe that’s the result of the hearing loss. Do you guys know of anything to slow/prevent or recover the hearing?

 

[Xam198]

@ morgin, i use high volume on both headphones and speakers to have a lower input level on the zoom H5 to have a better S/N
I've tried with another comuter, i don't have anymaore (right now) the "qsssqsssqsss" at the end od the recording of sinusoid.
Here is the sinusoid recorded /headphones

 

[morgin]

@ morgin, i use high volume on both headphones and speakers to have a lower input level on the zoom H5 to have a better S/N
I've tried with another comuter, i don't have anymaore (right now) the "qsssqsssqsss" at the end od the recording of sinusoid.
Here is the sinusoid recorded /headphones

The volume made a big difference not only the loudness but to the quality. I don’t know if what you’re using is similar to behringer I use. But just try a recording based on how I fixed my issue. The volume can be fixed in eqapo afterwards.

I had the volume loud enough for the start of the sine sweep to be picked up by the mics in my ears, but not too sensitive to any other sounds from outside (on the behringer it shows when sound is being picked up with lights) using the gain to change the sensitivity on each mic. And make sure there’s no clipping too.

I think everything audio interface, speaker and windows my volume was set at around 60%.

It seemed like the louder I listen the more the mics will pick up and drown out the background noise. But that was wrong too loud causes the spiky graph and unnatural sound.

 

[lowdown]

This is a long shot but worth asking. I understand if I don’t get a reply for this and not really expecting one as it’s not a medical forum

But my mum has sudden hearing loss. She doesn’t listen to loud tv or headphones and doesn’t work near loud equipment. There’s is tinnitus too I believe that’s the result of the hearing loss. Do you guys know of anything to slow/prevent or recover the hearing?

Google "causes of sudden hearing loss". There's a wide range of possible causes, some reversible, some not. She should definitely see a doctor. Good luck.

 

[Xam198]

I will try with lower volume and higher recording level, keeping a good headroom.I'm using a zoom H5, i hope my problems don't came from that, i will perhaps buy a umc202hd

But one thing that worries me is that "humm", a typical sound of ground loop : if the mic touch something, my finger, the earplug, i hear this humm - I monitor it directly to the zoom H5 . Then if i touch the vxlr, the hummm disappear. One mic do this, the other less. Anybody has experimented this ? The humm is not so huge, but i can differentiate it from noise and so if i increase the level of the H5 input do decrease volume, this humm will be more important. My mics are primo EM258. I ve tested pluggin the mics to a little mixing table, same thing.

 

[reter]

I bought some plaid hopefully can help with attenuating the reverb

they seem pretty thick

 

[morgin]

I will try with lower volume and higher recording level, keeping a good headroom.I'm using a zoom H5, i hope my problems don't came from that, i will perhaps buy a umc202hd

But one thing that worries me is that "humm", a typical sound of ground loop : if the mic touch something, my finger, the earplug, i hear this humm - I monitor it directly to the zoom H5 . Then if i touch the vxlr, the hummm disappear. One mic do this, the other less. Anybody has experimented this ? The humm is not so huge, but i can differentiate it from noise and so if i increase the level of the H5 input do decrease volume, this humm will be more important. My mics are primo EM258. I ve tested pluggin the mics to a little mixing table, same thing.

Isn’t that something to go with grounding?