What is a potential issue with relying solely on audio surveillance for monitoring employees?

Relying solely on audio surveillance for monitoring employees can indeed present several challenges that can affect the effectiveness and the appropriateness of such an approach. The correct answer points to the potential logistical issue that arises from the nature of audio surveillance.

Audio surveillance may require the monitoring officer to call at prearranged times, which can hinder real-time monitoring. This limitation can reduce the ability to react promptly to incidents as they happen, since the officer is bound by a pre-set schedule. Unlike video surveillance, which can provide continuous oversight regardless of time, audio monitoring might not capture events as they unfold unless the monitoring is constant, which is not feasible if it relies on scheduled calls.

The other choices suggest alternative concerns—while audio surveillance may provide excessive information or cause trust issues, or even be less effective than video surveillance, the specific challenge of requiring timed calls highlights a practical and operational limitation that could impede effective employee monitoring. This makes it a significant concern when considering the efficiency of an audio-only monitoring system.