Chapter 11

How Is Sound Produced,

Propagated and Perceived?

We humans communicate with each other through sounds. It enables us to send across a massage to someone, be it a comment, a joke or a cry for help. It aids us in letting out our Emotions and a facilities an effective transfer of information,making it a channel for our enjoyment and enhancement.But what is exactly is a sound?

SOUND PRODUCTION , PROPAGATION SOUND PRODUCTION , PROPAGATION AND PERCEPTIONAND PERCEPTION

Sound WavesSound Waves Production SoundProduction Sound Propagation of SoundPropagation of Sound Perception of SoundPerception of Sound PicthPicth

SOUND WAVESSOUND WAVES

Sound waves carry energy, as do all Sound waves carry energy, as do all waves. This means that the source of waves. This means that the source of the sound must supply energy.the sound must supply energy.

Playing an instrument for an Playing an instrument for an extended period of time is also very extended period of time is also very tiring.tiring.

Sound waves are longitudinal. Sound waves are longitudinal.

PRODUCTION OF SOUNDPRODUCTION OF SOUND

Sound is produced when a vibration Sound is produced when a vibration causes pressure variation in a causes pressure variation in a medium.medium.

The human voice uses several types The human voice uses several types of sound production and of sound production and modification mechanics.modification mechanics.

PROPAGATION OF SOUNDPROPAGATION OF SOUND

A Medium is a material to travel A Medium is a material to travel through. through.

Sound waves can travel though Sound waves can travel though solids, liquids, and gases but mot solids, liquids, and gases but mot through a vacuum.through a vacuum.

Reflection and diffraction have large Reflection and diffraction have large effects on the sound you hear.effects on the sound you hear.

PERCEPTION OF SOUNDPERCEPTION OF SOUND

The The earear is an amazing sound is an amazing sound detector.detector.

- it can detect sound waves- it can detect sound waves

- sensitive to an enormous - sensitive to an enormous range of wave amplituderange of wave amplitude

- a complex sense organ- a complex sense organ

HOW TO DETECT A HOW TO DETECT A SOUND?SOUND?

Pitch Pitch LoudnessLoudness Tone QualityTone Quality

PITCHPITCH

the the PITCHPITCH of a sound is the perception of a sound is the perception of highness and lowness of a sound.of highness and lowness of a sound.

Sound frequency is the number of sound Sound frequency is the number of sound waves that passes through a point in a waves that passes through a point in a certain amount of time.certain amount of time.

The Hertz (Hz) is a unit to measure The Hertz (Hz) is a unit to measure frequency a so pitch is measured in hertz frequency a so pitch is measured in hertz this is called the this is called the audio frequency audio frequency range. range.

LOUDNESSLOUDNESS

LoudnessLoudness of a sound is determined of a sound is determined mainly by the amplitude of the sound mainly by the amplitude of the sound wave.wave.

Intensity Intensity is a defined by a physical is a defined by a physical quantity that defends on the quantity that defends on the amplitude of a sound.amplitude of a sound.

Cause pain and damaged to the ear Cause pain and damaged to the ear is called is called threshold of painthreshold of pain. .

TIMBRETIMBRE

The The timbretimbre of a sound is used to of a sound is used to distinguish between two different distinguish between two different sounds that have the same pitch and sounds that have the same pitch and loudness.loudness.

Pure tone Pure tone is a simplest wave form is a simplest wave form have a soft ,pleasant tone quality have a soft ,pleasant tone quality and sinosoidal. and sinosoidal.

THANK THANK YOU!!!YOU!!!

BY: CAGUITLA, NICOLE B.