OPSC OCS 2019 · Question 90 of 99
General Studies
Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz. ( Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high- frequency sensitivity as they mature ; the upper limit in average adults is often closer to 15–17 kHz.)
Source: OPSC OCS Prelims 2019 GS Paper-I; answers per hemunda.com unofficial key
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