Which type of devices are listed as noise producing in aviation contexts?

• A. Radio Transmitters
• B. Pyrotechnics
• C. HVAC Units
• D. Navigation Lights

Answer: (B)

Noise-producing devices in aviation are those whose function is to generate audible sound. Pyrotechnics fit this because they create loud bangs and bursts when activated, such as flares or signaling devices, which are intentionally loud for visibility and signaling purposes. In contrast, radio transmitters operate by emitting radio waves, which is a different type of signal and not audible noise; HVAC units and navigation lights may produce some ambient hum, but they aren’t categorized by their noise-producing capability in this context. So, pyrotechnics are the best fit for what the question is asking.