Definition of thermal noise
: radio-receiver or amplifier noise due to thermal agitation of the free electrons in the circuit and the tubes —called also Johnson noise — compare shot effect
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up thermal noise? Please tell us where you read or heard it (including the quote, if possible).