| 摘要 |
PROBLEM TO BE SOLVED: To transmit sounds to a user in a state that allows the user to easily hear.SOLUTION: In one embodiment, an electronic apparatus (for example, a portable telephone 1A) includes: a piezoelectric element; a first sound generation part which is vibrated by the piezoelectric element and generates air conduction sounds and vibration sounds transmitted by vibrating a part of a human body; and a second sound generation part generating air conduction sounds. For example, the portable phone 1A outputs speech sounds in a human body conduction method when a sound pressure (loudness) of sounds occurring around the portable phone 1A, such as engine sounds of vehicles, sounds of tires, background music on the street, speaking voices of humans, announcement in stations, rail sounds of trains, becomes equal to or higher than a threshold value. |
