What is anti loitering?

According to the inventors, this is a “safe” sound which relies upon the irritation it causes as a way of getting rid of youngsters when they are “loitering”, and therein lies its aim.

Is the mosquito device legal?

The Mosquito device is 100% legal to own and use and requires no planning permissions.

What pitch can adults not hear?

What is the human hearing range? Humans can hear sounds in the frequency range between about 20 Hz to 20,000 Hz . Babies may be able to hear frequencies above this range.

What sounds can humans not hear?

Infrasound is the span of low-frequency sounds below 20 Hz that fall below the hearing range of humans. While these sounds escape our ears, scientific instruments can detect them—and tell us some interesting things about the planet.

What material blocks high frequencies?

Polyurethane is quite effective at attenuating high frequency sound waves, but it does not provide low frequency isolation unless sufficient thickness is used. The porous nature of polyurethane greatly reduces acoustic reflection, but this low density also allows for the transmission of sound energy.

Can you block frequency?

High frequency sound waves are more easily blocked by heavy materials because they lose their energy faster. Low frequency waves, however, cause fewer vibrations in the material and so can pass through more easily. Therefore, you need heavier and thicker solid materials to effectively block them.

Are anti loitering devices legal?

As an individual you have a legal right to peaceful enjoyment of your property or business. The Mosquito device is 100% legal to own and use and requires no planning permissions. The government has stated that, “Mosquito alarms are not banned, and the government has no plans to ban them”.

What is an anti child alarm?

Anti-child alarms emit high-frequency sound Anti-child or mosquito alarms work by emitting a super high-frequency sound that only children and young people can hear. Not quite as high-frequency as the sound produced by a dog whistle, but the principal is the same.

Do Sonic noisemakers target teenagers?

Sonic Devices Target Teenagers In Philadelphia To keep teens away after closing hours, Philadelphia has installed sonic devices in parks. They are noisemakers that mostly the young hear and have been banned elsewhere.

How loud is teen away’s sound?

We have tested Teen Away with 5 year old desktop systems through to very basic Netbooks using internal speakers and have yet to find a system that cannot generate sound in the range of 12,000 Hz to 22,000 Hz. (2) Purchase, instantly download, install, unlock.

Do sonic devices work to repel teens?

Sonic Devices Play High-Pitched Noises To Repel Teens A sonic device is seen (at top right) at Barrett Playground in Philadelphia. Thirty parks in the city have the devices, which emit a constant, high-pitched noise that only teenagers and young adults can hear. A sonic device is seen (at top right) at Barrett Playground in Philadelphia.

How do I test the sound of my teen away?

Play some music to ensure that sound is operational. Run Teen Away. (4) Click on the “Test Volume” button. This plays a sound that contains a variety of frequencies between 500 Hz and 6000 Hz which anyone can hear. Adjust the volume so that the volume is high enough to be annoying but not so high that pain is generated.