WaPo recently did a story on the new mosquito device at Chinatown.
Can you hear it? Try it out.
11 KHz – Should be audible 60 years old and under
12 KHz – Should be audible 55 years old and under
13 KHz – Should be audible 50 years old and under
14 KHz – Should be audible 45 years old and under
15 KHz – Should be audible 40 years old and under
16 KHz – Should be audible 35 years old and under
17 KHz – Should be audible 30 years old and under
18 KHz – Should be audible 25 years old and under