The performance of fire alarm audible notification in a wide open space can be analyzed using a condition called free-field condition, where the sound pressure level (SPL) decreases roughly by a specific decibel value every time the distance from the source is doubled. Which of the following choices is the specific decibel value attributed to the free-field condition?
Leelo
2 months, 3 weeks agolengocho
1 year agoChris_S723
1 year, 5 months agoasim990
1 year, 6 months agohowmany
1 year, 8 months ago