Abstract: A method for reducing echo includes detecting whether an output sound volume is greater than a threshold value, and setting an input sensitivity from a first designated sensitivity value to a second designated sensitivity value when the output sound volume is detected to be greater than the threshold value. The method further includes detecting whether an interrupt signal is received, determining whether the interrupt signal is triggered by detecting that the output sound volume is greater than the threshold value when receiving the interrupt signal, detecting whether the input sensitivity is the second designated sensitivity value when determining that the interrupt signal is triggered by detecting that the output sound volume is greater than the threshold value, and setting the input sensitivity as the second designated sensitivity value when detecting that the input sensitivity is not the second designated sensitivity value.

Abstract: A dipole antenna includes a substrate, a radiating metal plate and a radiating metal line. The radiating metal plate is disposed on the substrate and has a first signal feeding point near a lateral side of the substrate. The radiating metal line has a second signal feeding point near the first signal feeding point.

Abstract: A system for receiving a signal is provided. The system includes an antenna, an amplifier, a transmission medium electrically connected between the antenna and the amplifier and an electrostatic discharge device electrically connected between the transmission line and the antenna.

Abstract: The present invention provides an image reading apparatus including a module, a base, a first guide rail, and a second guide rail. The module is provided to detect the images and has at least an image sensor. The base is provided to support the module. The first rail is used to guide the base to move along the first direction so as to provide the module detecting the first row of a document. The second rail is used to guide the base to move along the second direction so as to provide the module detecting the next row of the document. The image reading apparatus of the present invention is applied to a scanner or a fax machine.