moderate
intensity level
Given: Sound intensity level LI1 = 40 dB and sound intensity level LI2 = 20 dB. Reference sound intensity Io = 10^−12 W/m² (Threshold of hearing) Reference sound intensity level LIo = 0 dB-SIL (Threshold of hearing level) Get sound intensity I1 when entering sound intensity level LI1 = 40 dB: Sound intensity I1 = Io×10^(LI/10) W/m² = 10^−12×10^(40/10) = 0.00000001 W/m² = 10^−8 W/m². Get sound intensity I2 when entering sound intensity level LI2 = 20 dB: Sound intensity I2 = Io×10^(LI/10) W/m² = 10^−12×10^(20/10) = 0.0000000001 W/m² = 10^−10 W/m². The sound intensity I1 = 10^−8 W/m² is 100 times more than the sound intensity I2 = 10^−10 W/m². The sound intensity level LI1 = 40 dB is 20 dB more than the sound intensity level LI2 = 20 dB.
Better think of the sound pressure, when you are listening. Sound pressure moves your ears and the diaphragm of the microphones. The sound intensity is very small. The level of 50 dB is equal to 0.0000001 W/m2 acoustic intensity. Scroll down to related links and look at "Conversion of sound units (levels)".
120 decibels
A unit used to measure the intensity of a sound or the power level of an electrical signal. Someones voice could raise by a decibel.
moderate
light Intensity A+
Walking briskly is a good aerobic workout. The winds blew briskly and the sailboat picked up speed.
Endurance
Look it up in a dictionary! You can say walking briskly which would mean not hesitating/walking quite fast So I would say that it meant fast or quite fast! x
I believe they are called vigorous exercise.
That gives 3 dB more total intensity level.
intensity level
moderate intensity
intensity level
intensity level
vigorous intensity