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.
The loudness of sound is measurable, using units called decibels (dB). A decibel unit expresses the relative intensity of sounds on a scale from zero (think a gentle breeze) to about 120 dB (think fireworks). Normal speech is typically between 50 to 60 dB.