Enzymes /ËÉnzaÉªmz/ are macromolecular biological catalysts. Enzymes accelerate, or catalyze, chemical reactions. The molecules at the beginning of the process are called substrates and the enzyme converts these into different molecules, called products.ome household products use enzymes to speed up chemical reactions: enzymes in biological washing powders break down protein, starch or fat stains on clothes, and enzymes in meat tenderizer break down proteins into smaller molecules, making the meat easier to chew.
From Wikipedia, the free encyclopedia. An Audiometrist (from Latin audÄ«re, to hear; and from Italian -metria, âto measureâ ) or Audiometric Officer, is a health-care professional technician who has received special training in the use of Pure tone audiometry equipment.
Audiometry is the term used to describe formal measurement of hearing. The measurement is usually performed using an âaudiometerâ by an âaudiologistâ. In audiometry, hearing is measured at frequencies varying from low pitches (250 Hz) to high pitches (8000 Hz). An example of an audiogram in a person with normal hearing is shown in figure 3.