Physical noise such as traffic or construction can interfere with audibility. Closing doors and windows reduces external sounds entering the classroom, and adjusting one’s voice or using a microphone helps maintain a clear signal for students. These actions directly address the physical environment and thus reduce noise.
Option A:
Option A, speaking in a low volume despite noise, makes it harder for students to hear and actually increases the impact of noise on the message.
Option B:
Option B is correct because it actively reduces external noise and strengthens the teacher’s voice, improving the signal-to-noise ratio in the classroom.
Option C:
Option C, ignoring external sounds and continuing without any adjustment, assumes the noise will not affect comprehension, which is unrealistic when background sound is high.
Option D:
Option D allows side conversations, adding internal classroom noise that competes with the teacher’s voice and makes listening more difficult.
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