u/DrSubEngi

Hello,
does anyone have any experience with sound systems inside masks ? I am making a plague doctor cosplay and would like a voice changer inside the mask (not mounted on the chest, because I want the electronics inside the mask for easy removal and not fiddling with multiple cables going through my shirt and whatnot). I am using an INMP411 omnidirectional microphone, MAX98457 amplifier and a Teensy 4.0 microcontroller, with a 2W 8ohm speaker.

My main problem is the feedback. Unfortunately, the microphone and speaker are a few cm apart, and even if I tried all manners of software noise cancellation, AEC, half-duplexing, adaptive notching, low and high passes, foam insulation (not neoprene, don't have that one), pressing the speaker against a mesh leading to the outside of the mask (like a grate), the mask resonates so loudly that the microphone picks that up anyway and creates a horrible pitch reverb feedback.

I'm at my wits end, been at it since morning and nothing works so far. Tried looking for unidirectional microphones, but couldn't find any ones that wouldn't cost an insane amount.

If anyone has any tips, it would help me immensly!

Hello,
does anyone have any experience with sound systems inside masks ? I am making a plague doctor cosplay and would like a voice changer inside the mask (not mounted on the chest, because I want the electronics inside the mask for easy removal and not fiddling with multiple cables going through my shirt and whatnot). I am using an INMP411 omnidirectional microphone, MAX98457 amplifier and a Teensy 4.0 microcontroller, with a 2W 8ohm speaker.

My main problem is the feedback. Unfortunately, the microphone and speaker are a few cm apart, and even if I tried all manners of software noise cancellation, AEC, half-duplexing, adaptive notching, low and high passes, foam insulation (not neoprene, don't have that one), pressing the speaker against a mesh leading to the outside of the mask (like a grate), the mask resonates so loudly that the microphone picks that up anyway and creates a horrible pitch reverb feedback.

I'm at my wits end, been at it since morning and nothing works so far. Tried looking for unidirectional microphones, but couldn't find any ones that wouldn't cost an insane amount.

If anyone has any tips, it would help me immensly!

Hello,

this is my first ever PCB that I'm making for my cosplay. It's supposed to fit inside mask lenses and connect to an IR camera inside the mask. My hope is that the IR camera (separate module) will capture where I'm looking and relay the rough direction to a raspberry pi, which will then light up the corresponding LED in said direction.

Components:

• 9x SMD:LED_0603_1608Metric
• 1x AW9523B LED driver
• 100nF Capacitor
• 2x 4.7k resistors

I'm not quite sure if I've wired everything correctly, but DRC is showing me 0 errors and I've followed the data sheet of the AW9523B in regards to how to wire it. The grounding is a bit confusing to me (so far I connected a few things back into the driver's ground and then out to solder pin GND? Not sure if that's correct?)

Thank you for any replies and tips on how to improve this!

https://preview.redd.it/3hqalkhbv16h1.png?width=1132&format=png&auto=webp&s=1a057084dbee391a9f102b565b67334d7de9f23b

https://preview.redd.it/zsn8gzq4v16h1.png?width=1106&format=png&auto=webp&s=d060b2513ce16bdfa94682d41fd99c7fd36ee875

https://preview.redd.it/fse5r1w2v16h1.png?width=1125&format=png&auto=webp&s=8c3fba64e228c1ff0fa5f0bd5cff97e108507111

https://preview.redd.it/tmpfwax1v16h1.png?width=1452&format=png&auto=webp&s=82409bfd804d00e9e2782d990e86d8d049adc145

https://preview.redd.it/y1jmow3ou16h1.png?width=1250&format=png&auto=webp&s=a54fa87d835a84ca9390fd5855dfe013373b1a3d

Hello,

I am in the process of brainstorming a cosplay design that would implement 4 cameras around the head for increasing my field of fiew, since the mask really limits where I can see. I'd like thecameras, especially at the sides and the back of my head, to be rather small and hidden so they're not obviously camera from a distance, but I'm having a hard time finding any that would fit what I need, which is a larger FOV, small, possibly connected via USB or any smaller cable that I could extend into a raspberry pi mounted around my hip.

Does anyone have any experience with this, or any general tips of where to look for these kinds of cameras ?

Thank you!