SOUPED-UP cars with revving and roaring engines spoiled a village's tranquillity, Huddersfield magistrates were told.
The cars were taking part in race meetings on land in the Birdsedge/High Flatts area.
But James Peace, 35, of Syke House, Denby Dale, is pleading not guilty to 12 charges of breaking a noise abatement notice.
The notice was issued by Kirklees Council after people living near Broadstone Road complained about two motor groups using land jointly owned by Peace and his father.
Peace is said to have allowed the Whiterose Autograss Club and Yorkshire Junior Grasstrack Club to use the land.
The alleged breaches took place between April 3 and August 21, 2005.
If found guilty, Peace faces a maximum fine of £20,000.
Angela Smith, senior environmental health officer for Kirklees, visited a complainant's property.
She said: "It was quite quiet. It was peaceful, it's quite a tranquil area.
"Broadstone Road is a country road. There was birdsong, sheep bleating in fields, a nice tranquil setting."
Asked about the sound caused by the racing she said:
"The roar and the revving of the engines, particularly at the start of races, and then the continuing noise during each race, was very intrusive in the garden."
Peace, who was representing himself, said: "We have brothers and sisters and babies that come to the site."
He said some of the children were able to sleep in prams during races.
He said he and the organisers had taken steps to reduce noise.
The case continues.