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The symbols dBA, dBB and dBC are used for to estimated human ear’s reaction to sound.

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The symbols dBA, dBB and dBC are used for to estimated human ear’s reaction to sound.

(a) True

(b) False

This question was posed to me during an interview.

My question is from The Decibel topic in chapter Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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The correct option is (a) True

The explanation: The symbols dBA, dBB and dBC are used for to estimated human ear’s reaction to sound. They all fall under the subcategory of dB SPL which stands for sound pressure level. They are all weighted measures and are used to refer to the effects of noise on human and animals’ ears.

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