Amar Bose quote ✍️

Quote

We did experiments with the Boston Symphony for many years where we measured the angles of incidence of sound arriving at the ears of the audience, then took the measurements back to MIT and analyzed them.
Often perfumed powder
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Hint 1 meaning
A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety.
Hint 2 anagram
CLAT
Hint 3 another clue
BABY DOCTOR FOR SHORT
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