Thread for questions with scientific answers – page 9 electricity outage houston tx


To answer the question, the tone above 20Hz at which the pulse becomes an audible oscillator tends to dominate in most circumstances. However, depending on how your tone generator is set up, it may ignore signals coming too fast and begin to play the original tone again (say, a whole note on every 4th instead of a 16th or 32nd with a release curve that relays over to the next signal).

Finally, a chance to once again try to justify wasting five years studying music technology.So when the middle C is played over 20,000 time per second will nothing be audible, or will the rising secondary tone still be audible? Or will the middle C be perceived as a continuous tone and not discreet individual notes?

If you don’t mind me asking, where did you study music tech? I’ve had enough of the 9-5 and I’m thinking of going to Huddersfield to study one of their music tech courses. Mainly, I want to learn how to use DAW’s, audio synthesis environments, that kind of thing because I am useless with computers at the minute which is a hindrance to my production of bangin’ techno tunes.

How do we perceive sounds? How does a mechanical wave becomes an electric one? I remember reading about one theory that explains that we are able to perceive sounds because the neurons vibrate at the same frequency as the wave, but apparently they cannot vibrate more than 100 times per second, so this theory fails to explain how we perceive the high frequency waves.

I guess that the neuron itself doesn’t need to move at the frequency of the mechanical wave to actually send it to our brain, so how does it work? Isn’t electricity supposed to be of the same frequency as the incoming wave for it not to lose any information? How is that information coded?Oo I know this one! Here’s a link that shows a pretty good image/description of neurons:

Basically our nerve cells are designed to respond to different external stimuli. In the case of our ears, vibration. Once it receives said stimuli, it sends out a combination of chemical and electrical signals to the brain, which is what we interpret. In fact, pretty much everything we feel is because of a bunch of chemicals and electrical impulses floating around inside of us lol.

If I understand this correctly (and in great summation). The sound vibrates the eardrum, the small bones serve to amplify the vibration so that it passes through a fluid. Eventually it reaches another area which contains a membrane. This membrane is made from fibres which are all vibrating at different natural frequencies, and in order. I.e. one end is low frequency and the other end high. When a frequency of say 400Hz reaches this membrane, it causes the fibre vibrating at 400Hz to vibrate with a much greater energy (wave reinforcement). There are tiny hairs along the membrane, and these are touched by the vibrating fibre, sending an electric signal to the brain.

This electric signal is generated thus: When the hair cell is moved, an ion channel is opened mechanically. mostly K+ and Ca+ enter here, and the cell is depolarised (no difference in electrical charge across). This creates a receptor potential which opens another, voltage sensitive, gate. Calcium ions enter the cell through this gate and react to receptors, this causes a neurotransmitter e.g. acetlycholine to be released at the other end of the cell. These diffuse through a channel towards a nerve terminal where they bind to receptors and trigger a chain of electrical potentials along the nerve all the way to the brain.

You can see that the brain can ‘know’ the frequency of the sound due to the hair cells being located above a specific frequential fibre. Further, as in the eye, there is a threshold below which a signal is not sent – the signal cannot transmit amplitude, instead this is ‘calculated’ by the number of hairs triggered at the frequency.

All elements, including hydrogen, are formed by the strong nuclear force. The electromagnetic force plays a rather crucial role in the amount of each element that exists. The electromagnetic force repels protons making nucleosynthesis (production of nuclei) harder while the strong force binds nuclei making nucloesynthesis "easier". The ratio of hydrogen to helium formed in the early universe (first 20 minutes or so) is roughly 3 to 1 (~74% hydrogen, 26% helium). If the strong nuclear force were slightly weaker, only hydrogen would form and there would have been no helium. If the strong nuclear force were slightly stronger, most hydrogen would have combined to form helium and there would have been very little hydrogen. The ratio of the strong nuclear to electromagnetic forces is a fundamental parameter of our universe, and its value effectively determines the hydrogen/helium ratio. The other important factor is the rate of expansion of the universe. A faster expansion would have produced somewhat less helium.