Re: It's 2017
"Is it really? I'd suggest that the airside oiks at Heathrow have to endure far louder and more continuous noise."
Not really. The engines aren't that loud while at the terminal or taxiing, and when they're at full blast, taking off or landing, the natural tendency is there to be no one anywhere near the runways for multiple reasons. Furthermore, the sound of jet engines is more noisy (random) than a chime, which is more likely to cause resonance vibrations.