Audio Recording Device Detector
Question: Is there a reputable device that can detect an audio-only recording device? I have searched through multiple threads and they seem to focus on camera detection devices.
Background: I work in a medical office and a co-worker there always seems to know things that were discussed in private. This co-worker does not have friends within the office that would tell her these things. This co-worker was at a previous office prior to being moved to my office and her previous office also experienced the same thing and felt they were being recorded. She has also been caught in both offices snooping through other people's desk areas, so she's definitely the type. I have searched in the office for unexplained things with Wi-Fi or Bluetooth signals, but there are none. Are there any reputable devices that can pick up a microphone signal or something from an audio-only recording device?