Stealth aircraft Earlier stealth aircraft (such as the F-117 and B-2) lack afterburners, because the hot exhaust would increase their infrared footprint, and flying faster than the speed of sound would produce an obvious sonic boom, as well as surface heating of the aircraft skin which also increases the infrared footprint. As a result, their performance in air combat maneuvering required in a dogfight would never match that of a dedicated fighter aircraft. This was unimportant in the case of these two aircraft since both were designed to be bombers. More recent design techniques allow for stealthy designs such as the F-22
Acoustic shock shock at work. BT has already paid £90,000 to one worker that suffered from tinnitus. In March 2018, a musician won a claim for damages against the British Royal Opera House for acoustic shock caused by excessive noise during orchestral rehearsals. Acoustic shock Acoustic shock is the symptoms a person may experience after hearing an unexpected, loud sound. The loud sound, called an Acoustic Incident, can be caused by feedback oscillation, fax tones, or signalling tones. Telemarketers and call centre employees are thought to be most at risk. During the exposure, most people will experience discomfort and pain. After the