Which statement correctly expresses decibel level Beta in terms of the intensity ratio?

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Multiple Choice

Which statement correctly expresses decibel level Beta in terms of the intensity ratio?

Explanation:
Decibel level for intensity uses β = 10 log10(I/I0). This makes the scale logarithmic, so multiplicative changes in intensity become additive changes in decibels. If the intensity equals the reference intensity, the ratio I/I0 is 1 and log10(1) = 0, giving β = 0 dB. So zero decibels occur when the intensity matches the reference. In general, β is positive when I is greater than I0 and negative when I is less than I0. Doubling the intensity gives about +3 dB.

Decibel level for intensity uses β = 10 log10(I/I0). This makes the scale logarithmic, so multiplicative changes in intensity become additive changes in decibels. If the intensity equals the reference intensity, the ratio I/I0 is 1 and log10(1) = 0, giving β = 0 dB. So zero decibels occur when the intensity matches the reference. In general, β is positive when I is greater than I0 and negative when I is less than I0. Doubling the intensity gives about +3 dB.

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