How can you minimize background noise when using a sound-powered telephone?

• A. Close the hatch, position the microphone away from noise sources, and speak clearly.
• B. Keep the hatch open and speak loudly near the noise sources.
• C. Use ear protection only.
• D. Ignore background noise and proceed.

Answer: (A)

The key idea is to control what the microphone picks up so your voice comes through clearly and the background sounds don’t drown it out. A sound-powered telephone has no separate power source, so the signal on the line comes from your voice alone. If you cut down ambient noise, your words stay intelligible and easier to understand. Closing the hatch reduces the amount of external noise and drafts entering the space. Positioning the microphone away from loud noise sources minimizes how much machinery or other sounds get picked up. And speaking clearly helps ensure your message is carried with good intelligibility even if some background noise remains.

Leaving the hatch open or speaking loudly near noise sources would only increase the noise captured by the mic. Wearing ear protection doesn’t affect the microphone’s pickup or the line’s noise, and ignoring the noise won’t improve communication.