Two or three hairs for an hour x 8 hours  x the number of employees in a company = the number of falling hairs in a company in a day(An example: if there are 50 employees in a factory, 2 x 8 hours x 50 = 800 falling hairs).

About hair characteristics
	When hairs continue to grow, we can pull them out by the power of approximately 70g.  After three months they fall out naturally.  At last they are fallen by wind. Because of better detectors we can detect broken pieces of glass, pebbles, and plastics but it is still difficult even for detectors with X-rays to find out hairs and insects whose main ingredient is protein. We still need to depend on visual checks. See the NIKKEI BUSINESS newspaper

 The summary of the hair characteristics