On Sat, Mar 27, 2021 at 02:50:28AM +0100, LuKaRo wrote:
my grandmother needs headphones to watch TV, but
wearing them causes
her to miss all the conversation around her. Hearing aids that allow
both TV and microphone input are around 2.5k€. As I'm quite firm with
Linux, and have conducted several Raspberry Pi projects, I wondered if
it was possible to find a DIY solution for this.
If there is some budget available, then alternative, low- or no-latency
approaches (albeit non-DIY) would be:
1. Old-school analogue approach (<€100 total). Plug TV into stereo
input of mixer. Plug mic into mic input of mixer. Plug headphones
(or Bluetooth transmitter, or induction earrings) into mixer
headphone jack. Adjust levels to taste.
- Small mixer e.g.
https://www.thomann.de/gb/the_t_mix_mix_502.htm or
similar (Behringer Xenyx 1002B is an alternative if you want a
post-preamp insert point for a noise gate and/or compressor)
- Gooseneck or measurement microphone e.g.
https://www.thomann.de/gb/the_tbone_tb312s_schwanenhalsmikro.htm or
https://www.thomann.de/gb/the_tbone_gm_5212.htm or
https://www.thomann.de/gb/the_tbone_mm1.htm etc depending on
desired polar pattern (i.e. depending on where you will put the mic
and mixer, relative to the ambient sounds your grandma needs to
hear)
- Optional noise gate if your mixer has an insert jack, e.g.
https://www.thomann.de/gb/behringer_nr300_noise_reducer.htm
- Optional Bluetooth transmitter if she already has Bluetooth
headphones, e.g.
https://www.amazon.de/s/ref=nb_sb_noss?url=search-alias%3Daps&field-key…
- Optional induction earrings or loop, if she wants to use her
existing hearing aids instead of headphones, e.g.
https://www.amazon.de/-/en/Monacor-3-5mm-Jack-Induction-Loop/dp/B003DPH854/
or
https://www.amazon.de/-/en/Geemarc-Iloop-Induction-Sling-Neckloop-black/dp/…
or
https://www.amazon.de/-/en/Geemarc-CLHOOK3-Induction-Earrings-3-5/dp/B00400…
2. Buy her a pair of headphones or earphones that have ambient sound
mixing functionality built in (<€250). E.g. Sony WH-1000XM3.
Good luck!
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