16
COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

Embed Size (px)

Citation preview

Page 1: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

COMMUNICATIONS

ist2_9243540-universal-icons-set-8wireless

Usuari
Usuari
Page 2: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 3: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 4: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 5: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 6: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 7: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

COMMUNICATIONS

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

mortongroveil.org

Page 8: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

Elements of Communication

transmitter receiver

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

channel

Page 9: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

How does communication travel?

isvr.soton.ac.uk

zdnet.com

Sound waves cables

Page 10: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

Communication through sound waves

nanobioart.com

Page 11: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 12: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

Representation of sound waves

• They are usually represented as wavy lines

www.tecno12-18.com

Page 13: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 14: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

Page 15: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

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

mendonphysics2007p9.blogspot.com

Page 16: COMMUNICATIONS ist2_9243540-universal-icons-set-8wireless

Relationship between Wavelength and Frequency

• Short wavelength high frequency.

• Long wavelenght low frequency.