Manufacturing Facility Speaker Noise Repair

I'm looking for experienced audio technicians, capable of troubleshooting and repairing a continuous static noise issue on speakers within a manufacturing facility. The noise exists even when the speakers are idle, with a slight noise during PA system use. Interestingly, the static noise isn't present while playing music. Your repair skills should include, but are not limited to: - Broad experience in large-scale speaker system troubleshooting and repair - Knowledge on eliminating static noise issues in different conditions - Familiarity with PA system maintenance and noise resolution Most importantly, the issue is present throughout the entire facility, affecting all our speakers. This indicates it's a system-wide issue that requires a comprehensive approach to successfully resolve. Hence, experience with similar large-sized projects would be highly advantageous. If you could help me stop this constant interference, making the workplace a noise-free environment, I'd be really grateful. I look forward to responses from freelancers with the right skill sets to tackle this issue. Thanks in advance for your time and bids.