An instrument for measuring the level of sound pressure in DECIBELs. Such measurements are called sound level readings. See: SOUND LEVEL. Sound level meters usually ...

Given the nature of their network, the early telephone pioneers’ efforts at sound level metering were based on line losses over a “standard mile” of cable. Meters calibrated to this standard ...

but a handheld meter is ideal for the most accurate results. While there are only two types of light to measure (incident and reflective), there are three types of meters a photographer can use ...