Educational Audiology (Ed Aud) Practice Exam

Internal noise in a classroom typically refers to which sources?

Classroom, building noise (HVAC) Noise outside the building Noise from the microphone Noise from the outside ceiling tiles

Correct Answer:

Classroom, building noise (HVAC)

Explanation:

Internal noise refers to sounds that originate within the room or its own infrastructure, contributing to the background sound level students hear while listening. The HVAC system is a classic internal source because it operates inside the classroom and often produces a steady hum that masks or competes with speech, reducing the clarity of what students hear. Noise from outside the building is external and not part of the classroom’s ambient sound, while noise from a microphone is an equipment-related issue rather than a persistent room-originating background noise, and noise from ceiling tiles outside the room doesn’t capture the typical ongoing internal background. Therefore, the classroom’s HVAC noise is the quintessential internal source.

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