33 links have been added on 11 ideas about #sound.
  1. djloon

    You can get these nearly invisible ceiling speakers from E-Bay
    https://www.ebay.com/itm/225134447196?

  2. Noisy kids, noisy TVs? Weirdly this article misses the spot completely as Sarah and Duck is one of the quietest programmes on the BBC. Sure, American sensationalist, adventure romps are action-packed and loud. Doesn’t have to be tht way though.

  3. More problematic is the loud audio from background music which drowns out the sound of the dialog. Kids voices compete with that and everything gets louder and louder in an audiological arms race. Here’s some possible solutions in the answers on Quora.

  4. Mouthdriller should be a film. It’s a very rational fear. Reat this https://willowcreekdds.com/cant-stand-the-dental-drilling-sound-the-best-ways-to-deal-with-anxiety-at-the-dentist/

  5. Airpods still need the graphic equalizer tool many hearing aid apps have. After receiving hearing test results, you should be able to crank certain frequencies up and others down. I am still waiting for pods to nail this and won’t be buying from the traditional hearing aid companies now I know this is going to change how us deafies hear stuff.

  6. It exists, this app lets you record sounds from your doorbell and landline and other stuff so it can vibrate and tell you when something is happening. Great idea, looks like it gets lots of good reviews too.

  7. There are a few apps for deaf people out there already, I guess one of these does light up when it hears the doorbell or other loud noises, though I doubt that you can tell them what each sound was so it learns which are important sounds or not. Someone should make an app for that, I agree.

  8. Looks like it depends on the medium it is travelling in. I guess if there isn’t a medium, then there isn’t a “sound”, though I may be wrong. I found this on stack exchange though…

    “In a solid, the phonon frequency is periodic, since phonons are defined by lattice displacements. In this case, the maximum frequency is estimated by twice the inter-atomic distance over the speed of sound. this gives 20,000 Ghz as the limiting phonon frequency, again higher, because the speed of sound in solids can be 2-3 times higher, and (twice) the interatomic spacing is five times smaller than a liquid. So it is safe to put the upper limit of ultrasound in metals at 100,000 Ghz, and then only for small-atom metals. If you look at optical phonon bands, you can get frequencies like this over a wide range of modes.”

  9. An answer to a similar question on Quora brings up the question of if an audio frequency is beyond the range of hearing, is it actually classed as a “sound” or something else, such as a simple vibration. Quarks (probably) vibrate, right?

  10. Interesting idea. I was intrigued, so I emailed the well-respected physicist Dr Philip Moriarty about this and although I couldn’t get a definitive yes or no answer to the question (of if there is a highest pitch), he did provide a great link to further reading and a nice insight into what, if anything would limit a very high pitch sound wave travelling in air.

    “The question of a highest pitch is really intriguing… The ultimate limitation will be the response time of the medium: how quickly can the molecules/atoms transfer the energy? And that will depend, in a first approximation, on the mean free path of the molecules – i.e. how far they travel, on average, without being scattered by another molecule. And then there’s the question of the attenuation as a function of frequency.”

  11. Being used for hearing problems by people around the UK who don’t want implants or surgery. So yeah, they exist already.

  12. My friend has some of the Aftershok ones, but the problem is you can’t drown out all the sounds your ears hear. Pretty pointless if you ask me.

  13. I’m not deaf but we got the vibrating one as we work from home in an office – it seems to work every time.