Abstract: A cover unit that is provided to an electronic device as a waterproof cover, the cover unit covering one or more openings formed in a housing of the electronic device with respect to a plurality of speakers, and comprising a frame member having a plurality of windows disposed therein, the windows facing the speakers in one-to-one correspondence, and a waterproof film covering the windows. Having such a structure, the cover unit covers the one or more openings formed in the housing, and has an advantageous effect of suppressing at least one of (i) an increase in parts composing an electronic device and (ii) an increase in distortion of sound. Additionally, since a vibration unit faces a corresponding one of the speakers, the unnecessary vibration of the vibration unit is inhibited, which leads to a reduction in the distortion of sound.

Abstract: A mobile phone apparatus 10 is provided with a five conductor earphone jack 26, etc. which is used to be shared between four and five conductor earphone plugs. Also, the two plugs have a left audio terminal at the same position, but a right audio terminal and a GND terminal at opposite positions. When the earphone plug is inserted, a tone signal is output from a third jack terminal. At this time, if the four conductor earphone plug is inserted, a tone signal is output as a leakage signal from a first jack terminal through a four conductor earphone. Then, the leakage signal is amplified, and input to a controlling circuit (70). On the other hand, if the five conductor earphone plug is inserted, a leakage signal is not output.

Abstract: A cover unit that is provided to an electronic device as a waterproof cover, the cover unit covering one or more openings formed in a housing of the electronic device with respect to a plurality of speakers, and comprising a frame member having a plurality of windows disposed therein, the windows facing the speakers in one-to-one correspondence, and a waterproof film covering the windows. Having such a structure, the cover unit covers the one or more openings formed in the housing, and has an advantageous effect of suppressing at least one of (i) an increase in parts composing an electronic device and (ii) an increase in distortion of sound. Additionally, since a vibration unit faces a corresponding one of the speakers, the unnecessary vibration of the vibration unit is inhibited, which leads to a reduction in the distortion of sound.

Abstract: A foldable mobile phone relating to the present invention includes: a first housing that includes a speaker, a receiver and a receiver hole; and a second housing that includes a microphone and a microphone hole, the receiver hole and the microphone hole each being covered with a waterproof film, and the waterproof film that covers the receiver hole facing the microphone hole in a closed state, and the mobile phone comprises: a low-pass filter that is connected to an output terminal of the microphone and has a cut-off frequency of 1 kHz; and an echo canceller that is connected to an output terminal of the low-pass filter, and is operable to cancel, from components of a signal output from the low-pass filter, components of a signal that has been input to the speaker.