General noise from the environment does not usually cause hearing damage. These noises can disrupt sleep and increase the risk of various health effects, such as cardiovascular disease.
Environmental noise is controlled under the Resource Management Act and local councils are the primary regulator.
If you are worried about environmental noise, including issues like noisy parties or other neighbourhood noise, contact your local council.
Councils in Aotearoa — Local Government New Zealand (LGNZ) (external link)