The five types of white cells and the approximate percentage they make up in the blood are: 1  Neutrophils (55% to 70%) 2  Band neutrophils (0% to 3%) 3  Lymphocytes (20% to 40%) 4  Monocytes (2% to 8%) 5  Eosinophils (1% to 4%) 6  Basophils (0.5% to 1%)
A sound level meter is an instrument that can measure sound level, commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental and aircraft noise. common variant of the sound level meter is a noise dosemeter (dosimeter in American English). However, this is now formally known as a personal sound exposure meter (PSEM) and has its own International standard IEC 61252:1993.
Also known as a noise dosimeter, decibel reader, or noise level meter, a decibel meter is a device that measures the intensity of sounds using the decibel (dB) unit.It lets you know just how soft or how loud noise is. A normal conversation, for example, would measure about 50 decibels.lso known as a noise dosimeter, decibel reader, or noise level meter, a decibel meter is a device that measures the intensity of sounds using the decibel (dB) unit.