Hospital corpsmen were previously trained at Naval Hospital Corps School, Great Lakes, Illinois until the 2011 Base Realignment and Closure Bill caused Hospital Corps School to be relocated to the Medical Education and Training Campus (METC) at Joint Base San Antonio, Texas.
characteristic of highness or lowness of a sound is called The frequency of a sound wave determines the pitch of the sound you hear. Remember that frequency is the number of waves passing a fixed point in a given period of time. A high-frequency wave with short wave-lengths, such as that produced by a tiny flute, makes a high-pitched sound.
A sound changes form 25dB to 5dB, what happens to the loudness. each change in 10dB raises or lowers the loudness. From 25 - 15, the loudness is cut in half. From 15 - 5 dB, the loudness is cut in half again. The person hears 1/4 of the original loudness.