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What is this device named LRAD for?

receives radio waves.
explores the bottom of the sea / ocean.
sends acoustic waves
emits infrared light
The Long Range Acoustic Device (LRAD) is an acoustic hailing device developed by LRAD Corporation to send messages and warning tones over longer distances or at higher volume than normal loudspeakers. LRAD systems are used by law enforcement, government and defense agencies, as well as maritime and commercial security companies to broadcast audible notifications and warnings over distance.
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Answers by country

receives radio waves.
explores the bottom of the sea / ocean.
sends acoustic waves
emits infrared light
answers
flagthe Netherlands
25%
6%
62%
6%
16
flagGreece
35%
5%
52%
5%
17
flagAustralia
27%
0%
50%
22%
18
flagPoland
27%
6%
47%
18%
3454
flagRepublic of Ireland
47%
0%
47%
5%
19
flagthe United States
23%
6%
43%
24%
125
flagthe United Kingdom
23%
9%
42%
23%
77
flagGermany
31%
6%
36%
23%
73
flagCanada
18%
18%
27%
27%
11
flagIndia
25%
33%
20%
20%
24
flagthe Philippines
60%
10%
10%
20%
10

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