Is public noise becoming Vietnam's default entertainment during Tet? The familiar blaring of karaoke machines and live music fills the air, growing louder with each passing celebration.
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Anybody can develop high frequency hearing loss, but it becomes more common with age. Exposure to loud sounds or high frequency sounds are common causes of ear damage in younger people.
A healthy human ear can hear quiet sounds like whispers, which are about 20 dB. A loud sound, such as a jet engine, is between 140 and 180 dB. The tone of a sound is measured in cycles per second.