Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
login
ben_w
on March 20, 2019
|
parent
|
context
|
favorite
| on:
Flashing Light, Sound Restore Memory in Alzheimer'...
I’d expect them to be an integer multiple of mains frequency, so 50 or 60 Hz.
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search:
