Filming has concluded, editing is next. The last big thing filmed involved a neighbourhood, after which cute little kids went around and took tea and coffee orders. Bec had a lovely time.
Matt came off his bicycle at considerable speed, but he's faring well. He tells some more biking and accident anecdotes, including doing maths in the emergency room to pass the time.
He had to buy a new helmet because the old one was involved in the accident. Now he doesn't know what to do with it. Listeners are encouraged to send in ideas for what to do with it.
On his way up the stairs, he slipped because he wasn't supposed to move his injured knee, breaking a toe on his other foot.
"Dogs famously lick things that heal." — Matt
Have you ever felt like your dings were missing something? What's the closest that the human vocal apparatus can get to mimicking the "ding" of an actual bell?
Bec starts by explaining the basics of sound, frequency, volume, partials, and harmonics/inharmonics with the analogy of throwing differently sized balls from a roof. She demonstrates overtones by singing, after which she plays a clip by singer Anna-Maria Hefele for comparison.
Bec brings on Beardyman (Jay Foreman's brother), who explains the difference between the human vocal tract and a ringing metal object. Some resonances will be canceling each other out and some reinforcing each other, as previously described in 005-1. Beardyman also explains the basics of attack, sustain, and release. He then creates a bell-like noise from his voice with the help of a frequency shifter. Apparently, the lyrebird is also capable of introducing inharmonics because it kind of has two throats.
The human voice might be able to mimic a bell if you find a way to produce inharmonics and have a quick attack and long release. If any listener is capable of this, they should get in contact.
"Inharmonics is just harmonics you don't like." — Matt
A Beardyman ding
Now that the weather is getting better, I need to use sunscreen, otherwise I get burnt. But I don't want to use too much sunscreen, otherwise I don't get a tan at all and am therefore more susceptible to sunburn. How do I optimize my usage of sunscreen?
To an Australian, a healthy tan is like a relaxing concussion. You get burnt by UV rays from the sun, which are the high-frequency parts of the spectrum. The warmth you feel is the low-frequency, infrared range. The most dangerous radiation, UV-C, is blocked by the ozone layer. UV-B is only partially stopped, and sunscreens mostly block this part. The bulk of UV radiation is UV-A, which is not as dangerous but still not perfect.
There is a technical difference between a sunblock and a sunscreen: A sunblock deflects the radiation, while a sunscreen absorbs the radiation (and breaks down in the process, which is why you have to reapply it). The factor is which fraction of light is let through: Factor 30 means ¹/₃₀ of the light makes it through. Factors are determined by intentionally sunburning a poor volunteer.
The results from the survey are in. Matt wanted to see if countries name their sun protection positive or negative depending on the sun severity. Australia and the USA are pretty sun-negative, while the UK is a bit more sun-positive. There's not a big correlation with age.
Having a tan is somewhere in the region of SPF 2 to 4. Putting on less sunscreen because you have a tan is a dangerous game to play. No UV exposure is safe exposure. Always put on your sunscreen.
A "ding" by Bec and a Beardyman ding
Andrew has sent a tweet saying that with their dislike of sport, their life is now wearing a michelin man suit while dressed in full ceremonial lord mayor's outfit while kicking puppies in a bouncy castle.
A "DING" by Andrew
Neil, a scuba diver instructor, responds with some scuba facts. Saturation divers don't sound squeaky because of the helium, but because the speed of sound is higher in the denser air. They also suffer from bone necrosis, which is something to watch out for in the high pressure utopia.
"You can't solve climate change by diluting the atmosphere, if you wanna keep your bones." — Matt
A "full ding" by Bec and a Beardyman ding
It is not Bec's card.