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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
21%
5%
68%
5%
19
flagGreece
33%
5%
55%
5%
18
flagAustralia
27%
0%
50%
22%
18
flagPoland
27%
6%
47%
18%
3525
flagRepublic of Ireland
47%
0%
47%
5%
19
flagthe United Kingdom
21%
8%
46%
22%
84
flagthe United States
22%
6%
45%
23%
131
flagGermany
33%
5%
40%
18%
90
flagCanada
18%
18%
27%
27%
11
flagIndia
25%
33%
20%
20%
24
flagthe Philippines
60%
10%
10%
20%
10

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