Question

47. A loudspeaker with a sensitivity of 15dB/V is fed by digital signal coming from a
microcontroller which outputs an 8-bit word using a 8-bit DAC with a 6.00 V reference.
(a) What is the range of sound pressure that can be produced in dB?
(b) If the required sound pressure is 120 dB, what should be the reference voltage?
(c) What pressures are produced by digital inputs of 9Ah, B5h, F1h, 11h and 4Ch?

Answer 1