Sound is a wave which is created by vibrating objects and propagated through a medium from one location to another. In this subject, we will investigate the nature, properties and behaviors of sound waves and apply basic wave principles towards an understanding of music.

Communication: transfer of information from a source or stimulus through a medium to a reception point. The medium through which the information travels can be air, water, space or solid objects. Information that is carried through all natural media takes the form of waves – repeating patterns that oscillate back and forth. E.g. light, sound, electricity radio and TV waves.

A medium must be stimulated in order for waves of information to be generated in it. A stimulus produces energy, which radiates outwards from the source in all directions. The sun and an electric light bulb produce light energy. A speaker, a vibrating guitar string or tuning fork and the voice are sound sources, which produce sound energy waves.

A medium is something intermediate or in the middle. In an exchange of communication the medium lies between the stimulus and the receptor. The medium transmits the waves generated by the stimulus and delivers these waves to the receptor. In acoustic sound transmission, the primary medium is air. In electronic sound transmission the medium is an electric circuit, Sound waves will not travel through space although light will. In space no-one can hear you scream.

A receptor must be capable of responding to the waves being transmitted through to be perceived. The receptor must be physically configured to sympathetically tune in to the types of waves it receives. An ear or a microphone is tuned in to sound waves. An eye or a camera is tuned in to light waves.

Today when you think of a life without a vehicle, it looks so strange. It has become an important part of your life. Each and every day, millions of cars have been manufactured by many famous car manufacturers like Toyota, Suzuki, Benz and many others. And all these auto manufacturers are in a big competition of making a car perfect for the use of their customers, and are performing challenging tasks. The Auto makers are providing vast accessories in the cars and also built-in technology systems like screen navigations and mapping.

They now place different types of Audio systems in the cars for your entertainment. Just from the entertainment perspective, an audio system is installed in the car to make your drive fun. A Car Audio system mainly comprises of speakers, auxiliary input devices, amplifiers, and head units to operate the accessories. The head unit is the best thing and varies with respect to design and use. It can allow you to use cassettes and CDs or a mini tape, whatever you want to use. These days car technology is daily updated; you can use your USB Drive to listen to songs; put mp3 songs just in the USB and enjoy in your car. An amplifier is needed to operate your digital speakers present at the back of your car. It allows handling treble and base, and many other systems to play with the sounds inside the car.

Your Speakers in the car also does matter as the basic sound frequency is made by your speakers. These days trend of Woofers is also increased that has widen the scope of car audio system. Auxiliary devices like your mp3 players or equalizers are also used now to give effects to your sound and add to the fun. The more you want, the more you can get. Technology for car audio supports is never ending. Different combinations are placed to seek a goal.