According to the ACI Guidelines for Landside Security

question 7

Multiple Choice

According to the ACI Guidelines for landside security

• A) Airports should incorporate blast proof walls and shatter proof glass
• B) Airports should reduce the number of visible garbage bins
• C) Airports should remind passengers to report suspicious behaviour or baggage
• D) Only A & C are correct
• E) All of these

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Definitions:

Pitch

The quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.

Frequency

The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light).

Sound Wave

A type of pressure wave generated by vibrating objects, traveling through mediums such as air, water, or solids, and perceived as sound by the human ear.

Müller-Lyer Illusion

A visual illusion in which two lines of the same length appear to be of different lengths because of the orientation of arrow-like tails at their ends.