How to use the Apple Watch Workout app: View progress during your workout. By default the Workout app shows progress towards your goal (if you specified one) as a ring on the lefthand side of the screen-as on the Activity app, the ring fills in clockwise and a complete ring represents a completed target.
Man-Made Noise (Industrial Noise) By man-made noise or industrial- noise is meant the electrical noise produced by such sources as automobiles and aircraft ignition, electrical motors and switch gears, leakage from high voltage lines, fluorescent lights, and numerous other heavy electrical machines.
Sound waves are made by the compression of the medium they travel through. In any medium, sound travels by making these compressions and rarefactions. As you can see, sound waves are dependent on matter. You can't compress and decompress empty space. A sound wave is formed by vibrations. If you're playing music, your speaker is vibrating.