"There is a consent condition relating to noise from the PA system during events at the park," Mr Kennedy said.
"Eden Park complies with this consent condition by ensuring the noise that emanates from the PA system goes through a limiter."
A report tabled for today's meeting of Auckland Council's finance and performance committee, which recommends the council roll over its security of the Eden Park Trust's $40 million ASB bank loan, refers to the trust's plan to borrow $1.8 million to install the barrier.
It's expected the stadium can fund interest repayments and operational costs but "there is currently no capacity to reduce debt further [or] address major maintenance issues," the report says.