The hypothalamus (from Greek á½ÏÏ, under and Î¸Î¬Î»Î±Î¼Î¿Ï, thalamus) is a portion of the brain that contains a number of small nuclei with a variety of functions. One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis).
Instrument Families in Music The instrument families are made up of four main families: woodwinds, brass, strings, and percussion. The pictures below include some of the instruments in each musical family. The instruments have an audio file to listen to the instrument sound. Scroll down the page to see all of the instruments. Woodwind Family - Woodwind instruments produce a sound by blowing into a mouthpiece. Some woodwind instruments use a reed to make the sounds play. Content on this page requires a newer version of Adobe Flash Player. Brass Family - Brass instruments are played by 'buzzing' the lips into the mouthpiece.
The Demonstration: Someone speaks into a microphone that is connected to an oscilloscope and you can see the patterns creates by their voice. Quick Physics: Sound is a wave that caused by vibrations in the air. A pure musical sound, such as a whistle, will produce a sine wave like the one shown above.Someone just talking with produce an irregular wave because it is a combination of sounds and the sounds waves add together to get the composite shown on the oscilloscope.The Details: You can see sound waves when a microphone is connected to an oscilloscope.A microphone changes the sound waves into an electrical signal. The oscilloscope then shows what these electrical waves look like.For a pure sound of only one frequency, like a tuning fork or whistling, the wave looks smooth and regular (as in the picture below). pure musical sound, such as a whistle, will produce a sine wave like the one shown above. Someone just talking with produce an irregular wave because it is a combination of sounds and the sounds waves add together to get the composite shown on the oscilloscope.