Final answer:
Throat boxing is true; it is a unique musical art form that combines throat singing, where multiple notes are produced simultaneously, with beatboxing, which involves creating percussion sounds using the mouth, lips, and voice.
Step-by-step explanation:
Throat boxing is indeed a blend of throat singing and beatboxing. Throat singing, or overtone singing, is a vocal production that allows a singer to produce two or more notes simultaneously by manipulating the resonances created as air travels from the lungs, past the vocal cords, and out of the lips to produce a melody. Beatboxing involves producing drum beats, rhythm, and musical sounds using one's mouth, lips, tongue, and voice.
The processes described for producing human speech and sounds relate to throat boxing in that the practitioner shapes the throat and mouth to form an air column that resonates in response to vibrations in the voice box. The performer uses mouth shaping and tongue position to vary the spectrum of overtones and their intensities to create different sounds, blending the techniques of both throat singing and beatboxing to produce unique musical expressions.
As such, the statement that throat boxing is a blend of throat singing and beatboxing is true.