Sound and Accessibility

SIGNAL

• Good - Perfect audio
• Bad - Noise/interference, corrupted audio, inaudible 
• 
  
• Radiowaves - what you can hear
• When Signal is weak, noise is louder 

NOISE

• Fuzz, background, buzz, constant
• Fans, Air-Con, computer, Kitchen, T.V, People

INTERFERENCE

• Inconsistent, unwanted

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Locations where noise may be an issue: 

• Roadside/Urban area/Shopping centre/cafe
• Windy area such as beach/hill/mountain
• Building site
• Electric Generator

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TV: Subtitles, audio description, Audio loop - a magnetic signal sent to the hearing aid. 

Cinema: Hearing loop

Radio:

Online: Subtitles

PPM dB
0 -10
1 -12
2 -14
3 -16
4 -18
5 -20
6 -22

PPM = -2(dB-5

PPI: Pixels Per Inch

PPI: Pixels Per Inch

In todays Digital Publishing lesson we looked at PPI (Pixels Per Inch) of images and how the resolution of the image works with the PPI. 

We were given an example as a class, this is what it was:

Resolution: 4608x3456

PPI: 72

So with a resolution of 4608x3456 @72ppi that would be 64x48inches in actual print size; that is absolutely crazy in size compared to a standard HD screen which is only 1920x1080. 

Print uses 300ppi instead of the digital equivalent of 72ppi this means that we would need to change the image from 72 to 300ppi.

To change it we would need to divide the resolution by 300, below is a visual demonstration:

We were then told to find an image ourself and then do the calculations to put it into print size: