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.
Something less dense than air means a faster relative speed of sound, something more dense means a s â¦ lower relative speed of sound.  The slower sound moves, the lower we perceive it's pitch, the faster the speed, the higher the perceived pitch.  Vocal chords stretch and tighten to make sounds of different pitches.