U mean Auto v Manual: ? If so, it is the difference between the sensitivity of your ears and the machine's sensors. If not, please re-submit with more info.
Answered 3/20/2014
4.3k views
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question