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Sound is, really, a thing we take for granted. It's all around us every day, whether it be something as simple as fingers tapping on a keyboard or the roar of a jet engine passing high overhead. Although we do take it for granted, testing sound levels, in many applications, is a necessary process designed to protect those around sounds from harm.
We all know the importance of testing various items and applications. Over time they might become damaged, work less efficiently, or - in the worst case scenario - injure someone who's working around them. Testing stops this process, but in certain environments, extra precautions must be taken when testing is carried out.
The IET has put out a new update to their 17th Edition Wiring Regulations book (BS 7671: 2008) that revamps a few sections that deal specifically with medical locations.
Whether in the air or on land, using thermal technology is a great way to spot animals that may have otherwise been completely hidden.