ScotRail has announced it is removing the devices - which target those aged under 25 - from Scottish stations
Controversial devices aimed at stopping youths loitering at railway stations have been banned.
ScotRail fitted mosquito devices at three stations in response to concerns raised about anti-social behaviour.
However youth groups hit out at the use of the contraptions – which emit high-pitched sounds that are usually only audible to those aged under 25.
After carrying out a review of the use of the devices, the rail firm announced this weekend that systems fitted at Hamilton Central, Helensburgh and Aberdeen would be removed.
David Lister, ScotRail Alliance director of safety and sustainability, said: “The safety and security of our staff and customers remains our priority, and we continue to work with all agencies – including the British Transport Police, Police Scotland, trade unions, and local authorities – to tackle any anti-social behaviour at our stations.
“These devices were always only a small part of a much wider effort to tackle anti-social behaviour wherever it occurred.
“A small number of customers raised concerns about the use of these devices. We always listen very carefully to customer feedback.
“Following a thorough review of the use of mosquito anti-loitering devices, we have taken the decision to ban them from the three stations at which they are currently installed.”
She said: “I’m delighted that ScotRail has said they will issue a ban on these devices, and will remove all existing ones, from their stations across the country.
“If progress is to be made in tackling instances of anti-social behaviour, the root of the problem must be addressed instead of resorting to measures like this, which only serve to further alienate young people from their communities.”