The sound phenomenon applies to all 777 operated by Malaysian Airlines and Singapore Airlines, except may be the SQ 777-300ER. 777 with MH and SQ use the Rolls Royce Trent derivitive except the 777-300ER which has a GE engine.
I have flown many times with both airlines to Johannesburg, Zurich, London and Brisbane and have been unnerved by the sound at takeoff and the initial climb. It is particulary intrusive in the cabin forward of the wing, the area normally designated as Biz class.