Before heading to the bunk during crew rest breaks, I would often take a stroll through the cabin making a couple of loops from the forward galley to the aft galley and back. This to help with the blood circulation to my lower legs.
Anytime a climb was initiated while I happened to be aft of the engines, I got an appreciation of the startle affect it had on the dozing passengers.
Once achieved, it was not so much the noise of the engines at CLB power would bother passengers, but the abruptness of the change from the established cruise power setting to CLB power by selecting VNAV that would startle them.
IMO, Honeywell could have programmed the VNAV logic to be gentler with the auto-throttles, especially during small altitude changes.
Last edited by wanabee777; 14th Feb 2016 at 17:35.