Wireless Microphone Options

I am trying to identify the best way to capture detailed audio recordings inside a 25'X25' clean room. We have tested an Axis P3367-V with a Axis T8353A Mic and have found that it works well but ambient noise (low level background music and various small machinery/devices) seem to effect the clarity of conversation needed to be recorded for training purposes. We also tested a Louroe LE-778 without any difference in quality. We are going to start testing some wireless options using lavalier microphones with a receiver that is connected to an Axis P8221 network I/O module but wanted to see if there are any other reccomendations? The VMS is Exacqvision.

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