Have you ever gone in a tunnel, spoken and then heard your voice echo? Have you ever wondered why this happens? Echos happen when sound hits a solid barrier that doesn't allow sound to go through it. This means that the sound has nowhere to go but back. This causes the sound to bounce around and causes an echo. But this all depends on how sound moves. Sound moves from molecule to molecule, it means that it vibrates the molecule, which passes the vibration on to the next molecule passing on sound. But what makes sound super loud. If an object or sound moves really, really fast, the object can break a sound barrier, this is a very loud noise that you can hear when you go to air shows and the jets fly overhead at very high speeds. The loudness of a sound is called amplitude, a louder sound has a higher amplitude. Sound is manipulated in many different ways and is very interesting the deeper that you dig into it.
S&EP
SP2:Using Models
We modeled how sound works when we made our own instruments. These instruments have to be able to play a scale of eight notes and demonstrate how sound works. One of these demonstrations that we saw when making our instruments is the air hole in the bottom of most wind instruments. This has 3 sides that are at a 90 degree angle, and one that is at a 45 degree angle. This splits the sound to keep half in and half out. This allows the sound to whistle through the other holes.
XCC
XCC: Scale, proportions and quantity
Instruments rely a lot on the scale and proportions of the instruments. This is important because if an instrument was not proportional or to scale, it could make an unexpected sound or not play a sound at all. In a wind instrument, the air holes have to be the right size or too little, or too much air will escape.
No comments:
Post a Comment