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I took some spoken word and ran it through audacity, attenuating the track in 10 second chunks to the equivalent of my hearing. I then added some brown noise at 0.03 and 0.05 amplitude to show how speech gets confuddled in noisy environments. This isn't helped by the fact that m,y deafness manifests in the bass regions, from about 1.5kHz down. I took some spoken word from www.poetscoop.org/arch...

Showcase of Lagrangian mechanics using an elastic pendulum