The Data Protection Commission is engaging with Apple over its gathering of people's personal data at its Cork facility.
It emerged in recent reports that personal recordings were being listened to as part of the tech giant's currently suspended listening project.
The company says the practice was in place "to measure how well Siri was responding and to improve its reliability".
However, The Guardian in July reported workers had overheard people having sex, buying drugs and discussing medical issues with doctors.
The company suspended the practice, which it calls grading, after the reports emerged.
Today, The Mail on Sunday reports as many 6,500 audio clips from Irish Apple devices were being transcribed each week as part of the transcription process.
Meanwhile, the Data Protection Commission has confirmed it's in contact with Apple about the issue.
In a statement, a spokesperson said: “We are engaging with Apple to establish further details on the processing of personal data in the context of the manual transcription of audio recordings collected by their digital assistant and to establish how Apple believes that such processing of data is compliant with their GDPR obligations.
"We note Apple’s statement earlier this week regarding the changes it has made in relation to Siri and will take this into account in our engagement with Apple on the matter.”
Apple has apologised for the practice of hiring contract workers to listen in to Siri recordings, with the firm acknowledging it hadn't been "fully living up" to their "high ideals".
The transcription practice is due to be re-introduced later this year with a number of changes - including asking users whether they want to opt-in to allowing the company retain and listen to audio samples.
