Evidence had also been given how Kerry County Council was contacted on Monday, the day before Mr O’Mahony was killed before by Rattoo dairy farmer Pat Walsh. He told the trial he had to wear ear protection to cope with the late Mr O’Mahony’s banger.
Mr Walsh described the noise as “horrendous” with the banger going off every four minutes and 26 seconds. He said he rang the environment section of Kerry County Council.
Their advice to him was to keep a logbook, which they would send out to him.
“It would follow you everywhere,” Mr Walsh said of the echoing sound.
The advice on crow bangers in the Department of Environment guidelines on noise is also to approach whoever is causing the noise. However the trial heard from several witnesses there was no point in approaching the late Mr O’Mahony.
Swiss man Michael Schumacher who owns a second home near the ancient round tower of Rattoo told how he and his wife considered moving to a hotel in August 2016 to get away from the repetitive loud noise which caused ringing in her ears.
Michael Ferris himself, a dairy farmer, said the noise would “wake the dead” and had been going on for 30 years.
Garda expert witness, PSV inspector Garda Jim O’Brien who conducted tests, found the late Mr O’Mahony’s crow banger to be louder than a shotgun at close range.
But there was the additional effect of percussion from the crow banger as it pushed air in front of it, said Garda O’Brien. He wore ear muffs to test it.
Frequency and positioning were other issues, the garda expert explained.
Kerry County Council has confirmed this Monday it had recorded 13 noise complaints in relation to crow bangers in the period 2013-2017. This was out of a total of 112 noise complaints ranging from loud music, burglar alarms, and construction-related noise .
This year there have been two complaints about noise from crow banger use.
“It is worth noting that apart from the option of making a complaint to a local authority, the public have direct recourse to the District Court under the EPA Act to abate noise nuisance,” the council spokesman said.
In 2017 a civil case came before the District Court in Kenmare about a crow-banger in a valley near Kilgarvan going off with such frequency and duration it was annoying neighbours.
The landowner in the Kilbanow area of Kilgarvan, Eamon Horgan of Suiomh Alainn, Kilgarvan,had been issued with a civil summons under a section of the Environmental Protection Agency Act of 1992.
Complainant Tracy Barrington of Brook Cottage, Kilbanow, Kilgarvan lived near the crow banger and a number of neighbours in the valley were involved in the complaint, Conor Murphy, solicitor for Ms Barrington outlined to Judge David Waters when the matter came up again on the civil list at Kenmare District Court on on the first Friday in February 2018.
Mr Murphy had characterised the device as "a propane gun" and said the valley "reverberates with noise" and he claimed it was having a devastating effect on people who live near it.
Mr Horgan who did not live in the valley needed to protect his silage from crows - and one of the points he would make was that this was an agricultural area, his solicitor Eoin Brosnan had said.
The complainants said the fact the banger was in a valley exacerbated the noise.
The matter later settled on terms and conditions, handed into Judge David Waters, The conditions ran to two pages.
Solicitor for the complainants, Mr Murphy has said while there is no specific legislation, he found how some local authorities, such as Limerick County Council have recommendations about the use and positioning of "bird scarers”.
In turn these are adapted from the UK National Farmer's Union, where bird scarers have been a matter of some contention.
The use of Crow Bangers has also been raised in the Dail.
Then Minister for the Environment Denis Naughten in a written reply to the Independent TD Michael Healy-Rae in May 2017, said any issues with crow bangers came under general noise regulation rules governed by the EPA. There were no plans for specific legislation, the minister also said.
The minister referred to the the Department’s Guide to Noise Regulations, a four-page leaflet outlining what is open to persons complaining about noise, including the powers of a local authority.
“Current legislation in the area of noise does not specifically address the use of bird scarers (also referred to as crow bangers), and I have no plans to introduce such legislation,” Mr Naughten said.
A Guide to the Noise Regulations, on the legal remedies open to a person experiencing nuisance noise.
“A significant portion of farmland in County Limerick is used for growing crops and it is understandable that farmers take measures to deter bird infestation.
However, it should be borne in mind that the use of scarers has the potential to cause perceived noise nuisance for the occupants of nearby dwellings,” it said inviting submissions and also providing a link to
A Code of Practice published by the UK National Farmer's Union (NFU).
Limerick City and County Council would recommend that farmers using these devices, adhere to this Code of Practice, the main points of which is to avoid Causing a Nuisance.