What does the term Dobly B or Dolby C printed on tape recorders and other sound systems refer to? Physics - Questions and Answers

What does the term Dobly B or Dolby C printed on tape recorders and other sound systems refer to?

(a)frequency modulated system

(b)amplitude modulated system

(c)noise reduction circuit Right sign

(d)both DC and AC power can be used

Details:NA

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