; (B) air carriers; (C) airport owners or operators; (D) aircraft manufacturers; (E) advanced air mobility manufacturers or operators; and (F) institutions of higher education; and (2) representatives of airport-adjacent communities from geographically diverse regions. (c) Duties The duties of the Advisory Committee shall include— (1) the evaluation of existing research on aircraft noise impacts and annoyance; (2) the assessment of alternative noise metrics that could be used to supplement or replace the existing Day Night Level standard, in consultation with the National Academies; (3) the evaluation of the current 65-decibel exposure threshold, including the impact to land use compatibility around airports if such threshold was lowered; (4) the evaluation of current noise mitigation strategies and the community engagement efforts by the FAA with respect to changes in airspace utilization, such as the integration of new entrants and usage of performance-based navigation