| Question 1: Such low frequencies can induce nausea, ________, disorientation and dizziness. | |||
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| Question 2: A whistle may also contain a small light ball, usually called the ________, which rattles around inside, creating a chaotic vibrato effect that intensifies the sound. | |||
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| Question 3: It should be noted, however, that many jurisdictions require that the warning device be permanently attached to the ________. | |||
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| Question 4: In ________ since the Metropolitan Police Services inception in 1829, officers have been issued with the "Metropolitan" whistle. | |||
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| Question 5: Industrial whistles are used for signalling and timekeeping both on railroad and ships, and in ________. | |||
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| Question 6: ________ generally produce three or four different frequencies at the same time to produce a non-major chord that is distinct, loud, and low in pitch. | |||
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| Question 7: Both rattles and whistles were used to call for back-up in areas where neighborhood beats overlapped, and following their success in ________, the whistle was adopted by most counties in England. | |||
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| Question 8: Many types exist, from small police and sports whistles (also called pea whistles), to much larger train whistles, which are steam whistles specifically designed for use on ________ and ships. | |||
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| Question 9: Another whistle widely used for sports such as Touch Football, Rugby League and Rugby Union is the Thunderer 58.5 by ________. | |||
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| Question 10: Railroads in particular used elaborate whistle codes for communication both within the ________ and with other trains. | |||
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