To provide a surreptitious photographing detector that is practical for a general-purpose detector and can detect a surreptitious photographing without detection errors.
A 1st amplifier 21 with twice the lowest amplification factor is selected, and only this amplifier is activated (step S1). Then a control section 50 discriminates whether an input signal is received (step S2) and discriminates whether the input signal has a frequency of 60 Hz, when the input signal is received (step S3). When the input signal has a frequency of 60 Hz, 1st-5th red LEDs 61-65 are lighted (step S4). That is, in this case, by making all the 1st-5th red LEDs 61-65 lit which denote the surreptitious photographing the detector informs a user about the probable surreptitious photographing from a close location.
HANAYAMA TOSHIHIKO
ITO OSAMU
CASIO COMPUTER CO LTD