6.551J/HST.714J — DEF TUV TUV OPER OPER Solution

I believe this is a recording of touch tone (DTMF) dialing tones for the number 8324665649. The only word represented by this sequence is the answer, TECHNOLOGY.

The double course number represents a course in the combined Harvard-MIT Health Sciences and Technology program which at the time of the hunt was called "Acoustics of Speech and Hearing."