Many secondary school Irish textbooks, such as Cúnamh, come with audio files to assist with Irish pronunciation. Cúnamh and other similar textbooks come with audio CDs and sample listening tests to help with pronunciation.
Another source that provides audio for help with Irish pronunciation include the language learning site duolingo.com. Others include the national Irish language radio station, RTÉ Raidio Na Gaeltachta, and Ireland's national Irish language TV station, TG4. Irish language broadcasts are available on many other stations, such as Splanc on Newstalk 106-108 FM.
Another great way to improve in Irish pronunciation is practicing casual conversation with a fluent Irish speaker. Many fluent Irish speakers live in areas known as Gaeltachts, which are found in Galway, Donegal, Cork and many other counties throughout Ireland.