Abstract: An electronic device is provided with a housing, a piezoelectric element, and a panel, which is attached to the housing and has a contact area contacting a part of human body, configured to vibrate by the piezoelectric element to generate a vibration sound to be transmitted by vibrating the part of human body, such that pressure from inside of the housing at the contact area of the panel is smaller than pressure from inside of the housing at different area from the contact area. Thereby the sound pressure property is improved, and thus the electronic device preferably transmits air conduction sound and vibration sound.

Abstract: An electronic device is provided with a housing, a piezoelectric element, and a panel, which is attached to the housing and has a contact area contacting a part of human body, configured to vibrate by the piezoelectric element to generate a vibration sound to be transmitted by vibrating the part of human body, such that pressure from inside of the housing at the contact area of the panel is smaller than pressure from inside of the housing at different area from the contact area. Thereby the sound pressure property is improved, and thus the electronic device preferably transmits air conduction sound and vibration sound.

Abstract: A portable terminal has one casing with a display unit and a speaker coupled to another casing with an operation unit and a microphone. The casings connect via a coupling unit and are capable of opening or closing by means of the coupling unit. The face of the casing with the speaker is directed in the same direction as the face of the casing with the microphone. The coupling unit enables one casing to be inclined to the other casing and to rotate around an axis substantially perpendicular to the face of the other casing with a microphone. Opening the casings increases the sound collecting rate of the microphone during a phone call and prevents a top face of the operation unit from being rubbed or scratched by the other.

Abstract: A portable terminal has one casing with a display unit and a speaker coupled to another casing with an operation unit and a microphone. The casings connect via a coupling unit and are capable of opening or closing by means of the coupling unit. The face of the casing with the speaker is directed in the same direction as the face of the casing with the microphone. The coupling unit enables one casing to be inclined to the other casing and to rotate around an axis substantially perpendicular to the face of the other casing with a microphone. Opening the casings increases the sound collecting rate of the microphone during a phone call and prevents a top face of the operation unit from being rubbed or scratched by the other.