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.
(c) Impact or impulse noise shall be measured as dB(P) sound pressure levels with. sound level meters which have an impulse or peak hold circuit, a rise time. constant not exceeding 35 milliseconds, and the capability to measure peak sound. pressure levels of at least 140 dB(P).c) Impact or impulse noise shall be measured as dB(P) sound pressure levels with. sound level meters which have an impulse or peak hold circuit, a rise time. constant not exceeding 35 milliseconds, and the capability to measure peak sound. pressure levels of at least 140 dB(P).