COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

COMMUNICATIONS

ist2_9243540-universal-icons-set-8wireless

mailer.fsu.edu/.../EarlyTankCommunications.jpg

www.textually.org/.../set2/mobileTelephones2.jpg

i.telegraph.co.uk/.../01251/childtv_1251151c.jpg

static.howstuffworks.com/gif/radio-show-1.jpg

static.panoramio.com/photos/original/8406495.jpg

COMMUNICATIONS

1. Elements of communication2. How does communication travel?3. Communication through sound waves

mortongroveil.org

Elements of Communication

transmitter receiver

www.tecno12-18.com Message: information sent in a communication

channel

How does communication travel?

isvr.soton.ac.uk

zdnet.com

Sound waves cables

Communication through sound waves

nanobioart.com

What’s a sound wave?

• A sound wave is a disturbance which travels through space .

• The waves carry signals from one place to another

jdsage.com jasonmar.com adsoftheworld.com

Representation of sound waves

• They are usually represented as wavy lines

www.tecno12-18.com

Parts of a sound wave crest

axis

trough Axis: the line running through the middle of the wave patern.Crest: the top part of a waveTrough: the lowest part of a wave

sci-toys.com

Characteristics of a sound wave

CYCLE`:Part of a wave that is continuously repeated

Amplitude (A):The distance from the axis to the top of the crest or the bottom of the troughWavelenght(λ):Distance between two adjoining crests

www.tecno12-18.com

Wavelength (λ)

amplitude(A)

www.tecno12-18.com

FREQUENCY• Frequency (f): number of waves per second• Mesure of frequency: Hertz(Hz)

mendonphysics2007p9.blogspot.com

Relationship between Wavelength and Frequency

• Short wavelength high frequency.

• Long wavelenght low frequency.