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.
PITCH IN SOUND: Pitch is the quality of sound which measures the frequency of the emitted sound wave. Generally, when the pitch(frequency) is higher the sound produced is shrill. When the pitch (or frequency) of the sound is lower the sound is blunt. So, we can say that women's voice box produces higher frequency wave(and hence their sound is shrill) whereas in males a low frequency sound is produced(and hence their sound is blunt)