Major players in the drama of 19th-century Texas were definitely the Comanches who at this time swept down from the cool highlands of the southern Rockies, and, mounted on horses, drove other tribes from West Texas.
What is SOUND? The periodic mechanical vibrations and waves in gases, liquids and solid elastic media. Specifically the sensation felt when the eardrum is acted upon by air vibrations within a limited frequency range, ie 20 Hz to 20 kHz. Sound of a frequency below 20 Hz is called infra. STRUCTURE-BORNE SOUND.
Sound Definition. Standard Definition. [n] the particular auditory effect produced by a given cause; the sound of rain on the roof; the beautiful sound of music. [n] the subjective sensation of hearing something; he strained to hear the faint sounds. [n] the audible part of a transmitted signal; they always raise the audio for commercials.