during cost analysis you will also compare the proposed cost elements with i actual costs ii previous cost estimates for same or similar work iii other cost estimates iv independent government estimates and v forecasts of planned expenditures
How Decibels Apply to Music and Sound. In music, decibels are a measurement of Sound Pressure Level (SPL). When we say the speakers at a rock concert are playing at 110dB, what we really mean is that theyâre playing at 110dB SPL. Since the decibel is only a ratio, 110dB is actually a comparison to a different number: 0 SPL.
More decibels means a louder sound. 70 decibels is 10 times as loud as 60 decibels; 60 decibels is 10 times as loud as 50 decibels, etc. (That's called a logarithmic scale.).he range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance.