Headphones
A headphone device comprising a surrounding ear pad and a sound generator which has a substantially rigid plate and a drive system for converting electrical signals into mechanical oscillations of the plate.
1. A headphone device comprising:
an ear pad; and
a sound generator comprising:
a plate mounted on the ear pad;
a first drive system arranged in the ear pad and configured to convert electrical signals into mechanical oscillations of the plate; and
a piezoelectric film arranged on one side of the plate for exciting the plate.
2. The headphone device as set forth in claim 1 , further comprising:
a frequency crossover configured to separate input signals into higher-frequency or lower-frequency signals;
wherein the higher-frequency signals are fed to the piezoelectric film and the lower- frequency signals are fed to the first drive system.
3. The headphone device as set forth in claim 1 ;
wherein the plate is formed from glass or a transparent material.
4. A headphone device comprising:
an ear pad; and
a sound generator comprising:
a plate mounted on the ear pad; and
a first drive system arranged in the ear pad and configured to convert electrical signals into mechanical oscillations of the plate,
wherein the first drive system comprises:
a magnet system; and
a voice coil;
wherein the voice coil is coupled to the plate.
5. The headphone device as set forth in claim 4 ;
wherein the first drive system comprises at least two magnets and, for each magnet, a coil that surrounds the magnet, and
wherein the magnets are arranged in the ear pad.
6. The headphone device as set forth in claim 5 ;
wherein the at least two magnets are arranged on opposite ends of the first drive system.
7. The headphone device according to claim 4 ;
wherein the plate is formed from glass or a transparent material.
8. A headphone device comprising
an ear pad; and
a sound generator comprising:
a plate mounted on the ear pad; and
a first drive system arranged in the ear pad and configured to convert electrical signals into mechanical oscillations of the plate,
wherein the first drive system directly excites a peripheral portion of the plate, and the first drive system does not directly excite a central portion of the plate.
9. The headphone device as set forth in claim 8 ;
wherein the central portion of the plate that is not directly excited by the first drive system includes a major area of the plate.
10. The headphone device as set forth in claim 8 , further comprising:
a second drive system having a piezoelectric film,
wherein the piezoelectric film is arranged for exciting the central area of the plate.