Some city parks in Philadelphia have installed sonic devices designed to prevent children and teens loitering, while older adults cannot even hear it. This is because ________.

Question

Quizplus · Accepted Answer

The frequency is too high for adults to hear because as people age, their ability to hear higher frequencies diminishes. These devices emit sounds at frequencies that are typically only audible to younger individuals.

Some City Parks in Philadelphia Have Installed Sonic Devices Designed