; (B) the threshold of noise at which humans experience health impacts; and (C) the effectiveness of noise abatement programs at airports throughout the United States. (3) Report Not later than 2 years after the date of enactment of this Act, the Administrator shall submit to Congress a report that describes— (A) the results of the study under paragraph (1); and (B) specific recommendations for new measures to mitigate the impact of aircraft noise on communities located near airports. (4) Funding The study under paragraph (1) shall be carried out with funds made available to the Office under section 6. 5. Quiet Communities Program Grants Section 14(c)(1) of the Noise Control Act of 1972 ( 42 U.S.C. 4913(c)(1) ) is amended— (1) in subparagraph (C), by striking and, at the end; and (2) by adding at the end the following: (E) establishing and implementing training programs on the use of noise abatement equipment; and (F) implementing noise abatement plans; . 6. Authorization of appropriations There is authorized to be appropriated to carry out this Act and the amendments made by this Act $21,000,000 for each of fiscal years 2019 through 2023.