Linguistic sounds, considered as external, physical phenomena have two aspects, the motor and the acoustic.
“Since boredom advances and boredom is the root of all evil, no wonder, then, that the world goes backwards, that evil spreads. This can be traced back to the very beginning of the world. The gods were bored; therefore they created human beings.”
“At Olduvai, for 20 years, Mary and I had investigated and made a general survey of the overall geology.”