A 2.0 W, 2.5 KHz sound emitter is released 180 m above a detector. The atmospheric temperature is 22°C. Find the i) frequency and ii) the sound intensity level detected by the detector 5.5 s from the instant the emitter was released.

• A. i) 3.0 kHz ii) 96 dB
• B. i) 2.1 kHz ii) 96 dB
• C. i) 2.1 kHz ii) 82 dB
• D. i) 3.0 kHz ii) 82 dB