![What are anti-child alarms, how do the 'mosquito' noise repellent devices work and how high-pitched are they? | The Sun What are anti-child alarms, how do the 'mosquito' noise repellent devices work and how high-pitched are they? | The Sun](https://www.thesun.co.uk/wp-content/uploads/2018/07/NINTCHDBPICT0004208829121.jpg)
What are anti-child alarms, how do the 'mosquito' noise repellent devices work and how high-pitched are they? | The Sun
![Couple who installed high-pitch 'mosquito' alarm to ward off racist teen vandals are now under investigation for noise nuisance | Daily Mail Online Couple who installed high-pitch 'mosquito' alarm to ward off racist teen vandals are now under investigation for noise nuisance | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2013/06/18/article-2343706-1A60A0E7000005DC-11_296x297.jpg)
Couple who installed high-pitch 'mosquito' alarm to ward off racist teen vandals are now under investigation for noise nuisance | Daily Mail Online
![The Mosquito Alarm is designed to repel youth away from areas by playing noise at a frequency most adults can't hear. : r/HostileArchitecture The Mosquito Alarm is designed to repel youth away from areas by playing noise at a frequency most adults can't hear. : r/HostileArchitecture](https://i.redd.it/qchepuk2agt51.jpg)
The Mosquito Alarm is designed to repel youth away from areas by playing noise at a frequency most adults can't hear. : r/HostileArchitecture
![Couple face £5,000 fine for using anti-child device on their home - to keep "screaming" kids away - Mirror Online Couple face £5,000 fine for using anti-child device on their home - to keep "screaming" kids away - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article6798564.ece/ALTERNATES/n310p/PAY-Noise-device-to-deter-children.jpg)
Couple face £5,000 fine for using anti-child device on their home - to keep "screaming" kids away - Mirror Online
![Dad-of-ten outraged after neighbour's 'ANTI-CHILD alarm' leaves seven-year-old daughter 'screaming in pain' - Mirror Online Dad-of-ten outraged after neighbour's 'ANTI-CHILD alarm' leaves seven-year-old daughter 'screaming in pain' - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article12930918.ece/ALTERNATES/s1200c/SWNS_ALARM_ROW_11.jpg)