Sound

                                                                      Sound

What is sound?

In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Sound is created when something vibrates and sends waves of energy (vibration) into our ears. The vibrations travel through the air or another medium (solid, liquid or gas) to the ear. The stronger the vibrations, the louder the sound.

What are the 3 types of sound?

Sound waves are characterized into three types. Audible sound waves are those that humans can hear. Infrasonic waves are those that are too low-frequency (below 20 Hz) for humans to hear. Ultrasonic sounds waves are those that are too high-frequency (above 20,000 Hz) for humans to hear.

What are the 4 properties of sound?

Since sound is a wave, it has all of the properties attributed to any wave, and these attributes are the four elements that define any and all sounds. They are the frequency, amplitude, wave form and duration, or in musical terms, pitch, dynamic, timbre (tone colour), and duration.

How is sound produced?

It is produced from a vibrating body. The vibrating body causes the medium (water, air, etc.) around it to vibrate thus producing sound. The sound is produced when something vibrates 

How is sound measured?

Sound measurements are done by determining the amplitude of the spectral components or by detecting the sound pressure through a physical device, e.g. a microphone. The total sound level of a signal is a root-sums-of-squares of the amplitude of all the spectral components.