Earphone for wideband communication
An earphone device capable of achieving sound bandwidths beyond the 150-7000 Hz wideband range, and configured for supra-concha or supra-aural placement. The earphone comprises at least two frequency range receivers positioned within a housing. In at least one embodiment, the earphone is capable of achieving a super-wideband range by physically combining a low frequency range receiver and a high frequency range receiver in a space-efficient and acoustically advantageous manner.
1. An earphone for placement against an ear pinna or on the ridges of an ear concha cavity, the earphone comprising:
a first frequency range receiver;
a second frequency range receiver electrically connected to the first frequency range receiver, wherein the first frequency range receiver and the second frequency range receiver are arranged physically in tandem with respect to the normal from the ear;
a housing having at least one wall forming a scoop cavity between the housing and the ear;
a first resonator cavity positioned outside of the first frequency range receiver within the housing;
a second resonator cavity positioned outside of the second frequency range receiver within the housing;
a first resonator port positioned outside the first frequency range receiver through the housing; and
a second resonator port positioned outside the second frequency range receiver through the housing,
the first resonator cavity and the second resonator cavity further positioned to transmit sound forward into the scoop cavity via the first and second resonator ports, respectively.
2. The earphone of claim 1 , wherein the first frequency range receiver is smaller in volume than the second frequency range receiver, thereby allowing the second resonator cavity to be adjacent to the first resonator cavity.
3. The earphone of claim 1 , wherein the first frequency range receiver is smaller in volume than the second frequency range receiver, thereby allowing the second resonator cavity to surround the first resonator cavity.
4. The earphone of claim 1 , wherein the first frequency range receiver and the second frequency range receiver are cylindrical in shape and defining a centerline, and wherein the centerlines of the first frequency range receiver and the second frequency range receiver are parallel to the normal from the ear.
5. The earphone of claim 1 , wherein the first and second resonator cavities acoustically communicate with each other via the first and second resonator ports and the scoop cavity.
6. The earphone of claim 1 , wherein the first frequency range receiver together with the first resonator cavity and first resonator port function as a high frequency sound delivery system, and the second frequency range receiver together with the second resonator cavity and second resonator port function as a low frequency sound delivery system.
7. The earphone of claim 6 , further comprising:
an electronic circuit or function for driving a combined high frequency sound delivery system and low frequency sound delivery system.
8. The earphone of claim 7 , wherein the driven combination is electrically in parallel.
9. The earphone of claim 7 , wherein the electronic circuit or function comprises a high-pass filter for passively filtering the high frequency sound delivery system.
10. The earphone of claim 7 , further comprising:
a communications circuit for connection to a telephone, the communications circuit electronically connected to the first frequency range receiver and the second frequency range receiver.
11. The earphone of claim 10 , wherein the response of the first frequency range receiver and the response of the second frequency range receiver covers a desired sound bandwidth.
12. The earphone of claim 11 , wherein the desired sound bandwidth is between about 75 Hz and about 18,000 Hz.
13. The earphone of claim 11 , wherein the desired sound bandwidth is between about 75 Hz and about 14,000 Hz.
14. The earphone of claim 11 , wherein the desired sound bandwidth is between about 150 Hz and about 18,000 Hz.
15. The earphone of claim 11 , wherein the desired sound bandwidth is between about 150 Hz and about 14,000 Hz.
16. The earphone of claim 11 , wherein the desired sound bandwidth includes frequencies above and below about 7,000 Hz, and wherein the first frequency range receiver provides all frequency response above about 7,000 Hz.
17. The earphone of claim 1 ,
wherein the second frequency range receiver comprises a diaphragm, the diaphragm having a front and a rear surface; and
wherein the first and second frequency range receivers are housed by the housing, the housing having a gap therein to allow acoustical leakage of the second frequency range receiver's sound volume velocity off the rear surface of the diaphragm of the second frequency range receiver through an auxiliary hole into an auxiliary cavity and through the gap to the ambient outside of the housing.
18. The earphone of claim 1 , wherein the at least one wall of the housing further defines a side-branch resonator cavity and a side-branch resonator port, the side-branch resonator port allowing air movement between the second resonator cavity and the side-branch resonator cavity, the side-branch resonator cavity of a volume of from about 3 cc to about 12 cc, such that the side-branch resonator behaves as an acoustical response notch-type filter.
19. The earphone of claim 18 , further comprising a damping material connected to the side-branch resonator port.
20. The earphone of claim 19 , wherein the damping material has an acoustical resistance of from about 1 Ns per cubic meter to about 3 Ns per cubic meter.
21. The earphone of claim 1 , wherein the second frequency range receiver comprises a magnetic structure having a hole therethrough, and wherein the hole in the magnetic structure of the second frequency range receiver comprises a side-branch resonator port allowing air movement between the second resonator cavity and a side-branch resonator cavity located at the termination of the side-branch resonator port.