Loudspeaker and electronic apparatus including the same

1. An electronic apparatus comprising:

an audio processor configured to process a sound signal; and

a loudspeaker configured to output sound based on the sound signal,

the loudspeaker comprising:

a first driver;

a second driver configured to output a frequency band higher than a frequency band output by the first driver; and

a plate-shaped enclosure comprising a chamber accommodating the first driver and the second driver and a sound emission passage adjacent to the chamber,

wherein the sound emission passage comprises:

a first sound emission passage extending along an arrangement direction of the first driver and the second driver and having the first driver disposed therein; and

a second sound emission passage extending along the arrangement direction of the first driver and the second driver, disposed inside the first sound emission passage and having the second driver disposed therein.

2. The electronic apparatus of claim 1 , wherein the second sound emission passage is arranged to be coaxial with the first sound emission passage along an extension direction of the first sound emission passage.

3. The electronic apparatus of claim 1 , wherein the second sound emission passage is arranged to extend over the second driver and to cover the second driver.

4. The electronic apparatus of claim 1 , wherein the loudspeaker comprises:

a third driver disposed in the chamber and configured to output frequency band higher than the frequency band output by the second driver to the sound emission passage; and

a third sound emission passage provided inside the second sound emission passage and extending along an extension direction of the second sound emission passage with the third driver disposed therein.

5. The electronic apparatus of claim 1 , wherein the chamber comprises a first chamber and a second chamber with the sound emission passage interposed between the first chamber and the second chamber,

the first driver disposed in the first chamber and configured to output sound to the first sound emission passage, and

the second driver disposed in the second chamber and configured to output sound to the second sound emission passage.

6. The electronic apparatus of claim 1 , wherein the second sound emission passage has a width equal to a diameter of the second driver.

7. The electronic apparatus of claim 6 , wherein the width of the second sound emission passage is ¼ or less of a maximum output frequency wavelength of the first driver.

8. The electronic apparatus of claim 1 , wherein the first sound emission passage comprises a backward passage extending over the first driver.

9. The electronic apparatus of claim 8 , wherein the backward passage comprises at least one sound absorber comprising a sound absorbing material.

10. The electronic apparatus of claim 9 , wherein the absorber is configured to seal the backward passage.

11. The electronic apparatus of claim 8 , wherein the backward passage is bent.

12. The electronic apparatus of claim 1 , further comprising a display.

13. An electronic apparatus comprising:

an audio processor configured to process a sound signal; and

a loudspeaker configured to output sound based on the sound signal,

the loudspeaker comprising:

a first driver;

a second driver configured to output a frequency band higher than a frequency band output by the first driver; and

a plate-shaped enclosure comprising a first chamber accommodating the first driver, a second chamber accommodating the second driver, a first sound emission passage configured to emit sound output by the first driver, and a second sound emission passage disposed adjacent to the first sound emission passage in a thickness direction of the first and second sound emission passages and configured to emit sound output by the second driver,

wherein the first sound emission passage extends with the first driver disposed between the first chamber and the second sound emission passage, and

the second sound emission passage extends with the second driver disposed between the first sound emission passage and the second chamber and includes a width that is smaller than a width of the first sound emission passage.

14. The electronic apparatus of claim 13 , wherein a minor axis length of the first sound emission passage and the second sound emission passage is ½ of a maximum output frequency wavelength of the second driver.

15. The electronic apparatus of claim 13 , wherein the width of the first sound emission passage approximately corresponds to a width of the first driver and the width of the second sound emission passage approximately corresponds to a width of the second driver.

16. The electronic apparatus of claim 13 , wherein the width of the second sound emission passage is ¼ or less of a maximum output frequency wavelength of the first driver.

17. A loudspeaker configured to output sound, the loudspeaker comprising:

a first driver;

a second driver configured to output a frequency band higher than a frequency band output by the first driver; and

a plate-shaped enclosure comprising a chamber accommodating the first driver and the second driver and a sound emission passage adjacent to the chamber,

wherein the sound emission passage comprises:

a first sound emission passage extending along an arrangement direction of the first driver and the second driver and having the first driver disposed therein; and

a second sound emission passage extending along the arrangement direction of the first driver and the second driver, disposed inside the first sound emission passage and having the second driver disposed therein.

18. The loudspeaker of claim 17 comprising:

a third driver disposed in the chamber and configured to output frequency band higher than the frequency band output by the second driver to the sound emission passage; and

a third sound emission passage provided inside the second sound emission passage and extending along an extension direction of the second sound emission passage with the third driver disposed therein.

19. The loudspeaker of claim 17 , wherein a width of the second sound emission passage is ¼ or less of a maximum output frequency wavelength of the first driver.

20. The loudspeaker of claim 17 , wherein the first sound emission passage comprises a backward passage extending over the first driver and comprising at least one sound absorber including a sound absorbing material.