How are the Emergency Alert System tones produced and what do they mean?
Why do tests of the Emergency Alert System on TV and radio include those loud and obnoxious noises?
Why do emergency services sirens have to be so loud? Do the siren /alarm sound/noise of ambulance, police, fire engine and doctors need to be so loud? I understand that they need to grab the attention. I am a very sensitive person and the loudness of the noise tests my tolerance levels. What can I do about it? Why do high-frequency noises hurt your ears? Why do we wake up at noise? Why are MRI machines loud? Why can't we hear ultrasonic and infrasonic sound waves? Is it normal for humans to fear loud sound? How does a siren produce noise? How does it work? What are sound waves? What are some noises that scare cats? Why do they get scared by that noise? Why can I hear the sound of electricity? My Radio set sound gets noisy when I switch on the tubelight of my room .How does waves emitted by a tubelight interferes with Radio waves(FM)? How is noise pollution caused? What are the reasons why a fuzzy sound is heard in the ear? Why do I hear strange noises at night? Why does a loud noise wake us up from a deep sleep? Why do so many current TV shows have background music so loud it drowns out the dialogue? Why do we hear the noise of jet planes more during the daytime compared to at night? What is the benefit of using ultrasound as compared to audible sound waves in echo-sounding (mapping of seabed and depth etc)? Will a sudden loud sound damage a speaker? Why does sound come from a tube light? What are the causes of noise pollution? Are electromagnetic waves and sound waves related? What are the effects of noise pollution? Why do empty cans make the most noise? Why is infrasonic sound dangerous for humans but ultrasonic is not? My ears keep ringing and I hear a very high-pitched noise randomly. Is this something to worry about? Why don't airplanes have active noise cancellation in their cabins? What are some of the dangers of radio waves? Why can't we hear ultrasound?