METHOD FOR SELECTING WRITING SHEET FOR STYLUS, TOUCHSCREEN SYSTEM, WRITING SHEET FOR STYLUS, TOUCHSCREEN, AND DISPLAY DEVICE

Provided is a method for selecting a writing sheet for a stylus, which makes it possible to accurately select a writing sheet with which the generation of annoying sounds during writing is suppressed.In the method for selecting a writing sheet for a stylus, a writing sheet that satisfies conditions 1-1 and 1-2 given below is selected as a writing sheet for a stylus. Sound that isgenerated when writing is performed under predetermined conditions by using a stylus on the surface of a writing sheet for the stylus is recorded. The sound pressure (dB/Hz) is calculated from the recorded sound on a per-1-Hz basis by way of fast Fourier transform. The values of dB/Hz at frequencies of 1 Hz to 20,000 Hz are normalized with a maximum value of 100 and a minimum value of 0, and the normalized values of dB/Hz are used as rated sound pressures P. The frequencies from 1 Hz to 20,000 Hz are divided into ten segments each having a width of 2,000 Hz, and an integrated value of the rated sound pressures P in eac