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UPSC 2006: What does the term ‘Dolby 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
(d)Both DC and AC power can be used
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Not attemptedCorrect Answer: (c) Noise reduction circuit
‘Dolby B’ (introduced in 1968) and ‘Dolby C’ are types of Dolby noise-reduction systems that encode/decode high-frequency pre-emphasis to cut cassette-tape hiss; they are not radio modulation schemes or power options. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Dolby_noise-reduction_system?utm_source=openai))
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What is the correct answer to this UPSC 2006 Science & Technology question?▼
The correct answer is option (c): Noise reduction circuit. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Computer & Information Technology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 86. It falls under Science & Technology > Computer & Information Technology.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Computer & Information Technology?▼
UPSC has asked 50 questions from Computer & Information Technology (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.