Human rights advocates are calling for a ban on sonic devices used to stop young people from loitering in public spaces. These devices emit high frequencies only people aged 25 or under can hear.
from ABC News https://ift.tt/2IN8OVS
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Human rights advocates are calling for a ban on sonic devices used to stop young people from loitering in public spaces. These devices emit high frequencies only people aged 25 or under can hear.
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