Acoustics and Noise Control
In this course we will try to understand how to keep all undesirable sounds away or prevent them from reaching the listener. All unwanted sounds are called “Noise”.
In this course we will try to understand how to keep all undesirable sounds away or prevent them from reaching the listener. All unwanted sounds are called “Noise”.
So we will try to understand how noise can be reduced if not be eliminated.
Now we are concerned about all sounds however faint – feeble they are. If we used the ray analysis assuming sound traveling like a ray of light in a straight line (because it was the best path of all sounds we wanted to hear reaching the listener), now we will consider sound traveling in the form of “Spherical Pressure Waves” (because even faintest sound is to be prevented from reaching the listener). So let us try to understand how to keep noise away.
Noise can be categorized into two types of sound, “Structure Borne Noise” and “Air Borne Noise”.
Structure Borne Noise :
Structure borne noise is when any vibrating object comes in physical contact of the structure, the vibrations are passed on the structure which also resonates to the frequency and thus produces noise (unwanted sound).
Airborne Noise:
Airborne noise is the sound that travels through the air medium.
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