For the record, noise abatement procedures are to be established by operators for IFR operations in accordance with ICAO PANS-Aircraft Operations (Doc 8168).
Its a noise abatement departure (ICAO B or 2) which is t/o thrust to 1500agl
Engee 73 is incorrect in that he has stated Procedure A (not B), which results in noise relief during the latter part of the procedure. Procedure B is t/o thrust to 1000'agl, and therefore provides relief close to the airport.
Think Procedure "A" way, should you need some help remembering.