EXAM: AVIXA CTS-D: Human Perception of Sound Test Questions and Answers Already Passed

EXAM: AVIXA CTS-D: Human Perception of Sound Test
Questions and Answers Already Passed
Logarithm CORRECT ANS-is the exponent of base 10 that equals the value of a number




Decibel CORRECT ANS-describes a base-ten logarithmic relationship of a power ratio

between two numbers.


-It uses a logarithmic scale to describe ratios with a very large range of values that can vary

over several orders of magnitude.


-It is also used for quantifying differences in voltage, distance and sound pressure as they

relate to power.




Decibels can measure what type of values? CORRECT ANS-Distance, Power, Pressure, or

Voltage




Pascal CORRECT ANS-SI Unit for Pressure




Decibel Formula for Power CORRECT ANS-dB = 10 * log (P1 / Pr)




Where:

, EXAM: AVIXA CTS-D: Human Perception of Sound Test
Questions and Answers Already Passed
dB = The change in decibels


P1 = The new or measured power measurement


Pr = The original or reference power measurement




if result is positive, the result is an increase, or gain. If it is negative, the result is a decrease,

or loss.




Decibel Formula for Distance CORRECT ANS-dB = 20 * log (D1 / D2)




Where:




dB = The change in decibels


D1 = The original or reference distance


D2 = The new or measured distance




This as the same as:


db= 10 * log (D1²/D²)