Hi Katie,
Are the sounds ambient or delivered over earphones? I think there are more options if external sound is to be occluded, but ambient sound should be possible too for some devices.
If full scalp coverage is needed I have used
CGX's Quick-32r with subjects seated in a lab or office setting and listening to music over earphones.
It could feel heavy after extended listening (30 mins to ~1 hour) but TRFs are recoverable. This is the device I have used the most for dry EEG and feels reliable.
I haven't used Wearable Sensing but their
DSI-24 looks interesting too.
If a more discrete device is needed for public wearing then around-ear or in-ear options could also be considered.
Depending on how many subjects you are targeting the in-ear devices could either be custom-fitted or generic.
I'm not sure if a commercial option is currently available for custom-fitted devices, I think various ear-EEG labs have just been making them in house.
There are some open (
cEEGrid's gel version) and commercial options (
NextSense,
IDUN,
Emotiv) but I haven't compared them -- other people on this list might be able to chime in!
Thank you,
Abhinav