What volume level should be maintained on the interphones?

Maintaining an adequate volume level on the interphones is crucial for effective communication in the aviation environment. Having the volume set to just the right level ensures that communications are heard clearly without causing unnecessary disturbance to other personnel. This level allows controllers and other staff members to pick up critical transmissions without straining their hearing or being overwhelmed by excessive background noise.

A volume that is too low could lead to missed communications, which can be detrimental in a fast-paced, high-stakes environment such as air traffic control. On the other hand, a very high volume might create a distracting atmosphere, potentially leading to misunderstandings or errors when multiple conversations occur simultaneously. It is essential to find a balance where the interphone is loud enough to hear calls clearly while keeping the noise level comfortable for everyone in the vicinity.