Which statement is false regarding electronic eavesdropping?

The statement regarding electronic eavesdropping that is false is one which claims that a listening device causes audible noise on the line. In reality, many listening devices are designed to operate silently, allowing them to capture audio without generating any sound that would alert those being monitored. This is a concerning aspect of electronic eavesdropping, as it makes detection more challenging and helps the unauthorized listener remain undetected.

On the other hand, the other statements reflect valid practices related to countering eavesdropping efforts. Engaging a technically familiar person in countermeasures is critical because they possess the knowledge required to identify and neutralize threats effectively. Both physical searches and electronic surveillance can serve as countermeasures, ensuring comprehensive protection against potential breaches. Furthermore, tracing and accounting for all wiring is part of standard security procedures to avoid unauthorized taps or monitoring devices, reinforcing the importance of thoroughness in safeguarding communications.