Sound

Sound

Diagram of the inner ear We can hear the sound,because of the frequency and intensity. People also can hear the sound by the noise,detecnt sounds. Our bodies change the energy in sound waves into nerve inpulses which the brain interprets.

The ear drum works by the middle ear bones,because it conduct sound from the ear drum to the fluids of the inner ear. The speed of sound is 340.29 m/s.

Doppler effect When wave energy like sound or radio waves travel from two objects, it changes if one or both of them are moving. The wavelength is the form of electromagnetic radiation like radio waves. People can say that the length of the sound wave affect the sound produces by the different kinds of electromagnetic energy apart.

Amplitude Amplitude is the objective measurement of the degree (negative of positive). Web site- []

Diagram of the amplitude Sound proofing Simplistically,when we sound proof something we are insulating against the build up of sound. Sound travels in low frequency waves in all directions from the source of the noise. These waves will travel until they hit a point of resistance such as a wall or ceiling.

Like refrigerator, washing machine, loud music (this thing makes the sound proofing in the room) Web site- []

Ultrasound

Noise Headphones Web site- [] Noise Headphones reduce unwanted ambient sounds by means of active noise control.