An advanced processor comprises a plurality of multithreaded processor cores each having a data cache and instruction cache. Images that are inputted are accumulated in a memory. The underlying cushion has a spring-like connection with the base wall. A vibration waveform extracting section extracts a vibration waveform of a frequency component having a frequency equal to a predetermined multiplication product of an induction heating frequency, from a waveform of the vibration detected by the vibration detecting section. The first fastener apparatus is securely attached to the elongated flexible body on one of the surfaces and near the first end.