1. A device for voice activity detection, comprising:
a sound signal analyser configured to determine whether a sound signal comprises speech, comprising:
a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system, wherein the microphone system is configured to determine the direction of a sound source causing a sound signal, is configured to further analyse the sound signal to determine whether the sound signal comprises speech when the sound signal emanates from a first range of directions, and is configured to determine that the sound signal does not comprise speech and perform no frequency spectral processing of the sound signal when the sound signal emanates from a second, different range of directions;
wherein the first range of directions is directed in a direction of an intended user’s mouth.
2. A device according to claim 1, wherein the microphone system comprises two microphone elements separated a distance and located on a line directed in the direction of an intended user’s mouth.
3. A device according to claim 2, wherein the first range of directions is defined as an area falling inside a cone with a cone angle \u03b1, wherein 10\xb0<\u03b1<30\xb0.
4. A device according to claim 3, wherein \u03b1 is approximately 25\xb0.
5. A device according to claim 1, wherein the microphone system comprises three microphone elements separated a distance and located in a plane directed in the direction of an intended user’s mouth.
6. A device according to claim 5, wherein two of said three microphone elements are separated a distance and located on a line directed perpendicular to the direction of an intended user’s mouth.
7. A device according to claim 1, wherein the microphone system comprises four microphone elements, located such that the fourth microphone is not located in the same plane as the three others.
8. A device according to claim 2, wherein the microphone elements are directional with a pattern having maximal sensitivity in the direction of an intended user’s mouth.
9. A device according to claim 1, wherein the microphone system comprises one directional microphone element together with one or more other microphone elements configured to remove the uncertainty in the direction of the sound source.
10. A device according to claim 9, wherein the directional microphone element is configured to measure a sound pressure level relative to the other microphone elements.
11. A device according to claim 9, wherein the device is a mobile apparatus.
12. A mobile apparatus according to claim 11, wherein the microphone elements are located at a lower edge of the apparatus.
13. A mobile apparatus according to claim 11, wherein a plurality of microphone elements are located at the lower edge of the apparatus and at least one microphone element is located at a distance from the lower edge.
14. A mobile apparatus according to claim 11, wherein the mobile apparatus comprises a mobile radio terminal, a pager, a communicator, an electric organiser andor a smartphone.
15. An accessory for a mobile apparatus, comprising:
a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system, wherein the microphone system is configured to determine the direction of a sound source causing sound a sound, is configured to further analyse the sound signal to determine whether the sound signal comprises speech when the sound signal emanates from a first range of directions, and is configured to determine that the sound signal does not comprise speech and perform no frequency spectral processing of the sound signal when the sound signal emanates from a second, different range of directions;
wherein the direction of the first range of directions is adjustable.
16. An accessory according to claim 15, wherein the accessory is a hands-free kit.
17. An accessory according to claim 15, wherein the accessory is a telephone conference microphone.
18. A method for voice activity detection, comprising performing operations as follows such that at least a portion of at least one of the operations is performed on at least one processor:
receiving sound signals from a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system;
determining the direction of the sound source causing the sound signals;
analyzing the sound signals to determine whether the sound signals comprise speech when the sound signals emanate from a first range of directions
determining that the sound signals to do not comprise speech and performing no frequency spectral processing of the sound signals when the sound signals emanate from a second, different range of directions;
wherein the first range of directions is directed in the direction of an intended user’s mouth.
19. A method according to claim 18, wherein the first range of directions is defined as an area falling inside a cone with a cone angle \u03b1, wherein 10\xb0<\u03b1<30\xb0.
20. A method according to claim 19, wherein \u03b1 is approximately 25\xb0.
21. A method according to claim 19, wherein the microphone system comprises at least two microphone elements located at a distance d from each other and located on a line directed in the direction of an intended user’s mouth, wherein the direction to the sound source \u03b8 is calculated as
\u03b8
=
arc
\u2062
\u2062
cos
\u2062
\u0394
\u2062
\u2062
t
\xb7
v
2
\xb7
d
where
\u0394t is a time difference between the sounds from the two microphone elements,
v is a velocity of sound.
22. A method according to claim 18, further comprising:
using one directional microphone element together with one or more other microphone elements to reduce uncertainty in the direction of the sound source.
23. A method according to claim 22, further comprising:
using the directional microphone element to measure a sound pressure level relative to the other microphone element.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-6. (canceled)
7. A hybrid drive device comprising:
a clutch that engages and disengages an output member of an internal combustion engine and an input member of an automatic transmission device with and from each other; and
a rotary electric machine disposed radially outwardly of the clutch so as to at least partially overlap the clutch in an axial direction as seen from a radially outer side, the rotary electric machine having a stator fixed to a case and a rotor coupled to the input member of the automatic transmission device;
a clutch lubricating oil hole formed in a center shaft that extends at a center portion of the clutch and the rotary electric machine;
a rotary electric machine lubricating oil hole formed in the center shaft; and
separation means for separating lubricating oil such that lubricating oil from the clutch lubricating oil hole is led to the clutch and lubricating oil from the rotary electric machine lubricating oil hole is led to the rotary electric machine
8. The hybrid drive device according to claim 7, further comprising:
a rotor support member that has a cylindrical portion that holds the rotor, a flange portion that extends radially inward from the cylindrical portion, and a hub portion supported on the case via a bearing at a radially inner end of the flange portion, wherein:
the clutch lubricating oil hole opens toward a space on one side of the flange portion in the axial direction;
the rotary electric machine lubricating oil hole opens toward a space on the other side of the flange portion in the axial direction;
the clutch is disposed on the one side of the flange portion in the axial direction; and
the separation means includes the rotor support member.
9. The hybrid drive device according to claim 8, further comprising:
a cover member that covers a coil end disposed on one side of the stator in the axial direction, wherein
the separation means includes the cover member.
10. The hybrid drive device according to claim 8, wherein:
the clutch has a clutch drum coupled to the input member, a clutch hub coupled to the output member, outer friction plates splined to the clutch drum, inner friction plates splined to the clutch hub, and a hydraulic servo disposed in the clutch drum to engage and disengage the outer friction plates and the inner friction plates with and from each other;
an outer peripheral surface of the clutch drum is formed with splines and a through hole, and the cylindrical portion of the rotor support member is engaged with the clutch drum through the splines so as to rotate together with the clutch drum; and
lubricating oil from the clutch lubricating oil hole flows out of the clutch drum through a gap between a distal end of the clutch drum and the flange portion, the splines, and the through hole, and is discharged to the oil reservoir.
11. The hybrid drive device according to claim 9, wherein:
the clutch has a clutch drum coupled to the input member, a clutch hub coupled to the output member, outer friction plates splined to the clutch drum, inner friction plates splined to the clutch hub, and a hydraulic servo disposed in the clutch drum to engage and disengage the outer friction plates and the inner friction plates with and from each other;
an outer peripheral surface of the clutch drum is formed with splines and a through hole, and the cylindrical portion of the rotor support member is engaged with the clutch drum through the splines so as to rotate together with the clutch drum; and
lubricating oil from the clutch lubricating oil hole flows out of the clutch drum through a gap between a distal end of the clutch drum and the flange portion, the splines, and the through hole, and is discharged to the oil reservoir,
12. The hybrid drive device according to claim 8, wherein:
an oil passage is formed on a radially inner side of the rotor so as to extend in an axial direction of the rotor; and
lubricating oil from the rotary electric machine lubricating oil passage is supplied to a coil end disposed on the other side of the stator, and supplied to a coil end disposed on one side of the stator via the oil passage.
13. The hybrid drive device according to claim 9 wherein:
an oil passage is formed on a radially inner side of the rotor so as to extend in an axial direction of the rotor; and
lubricating oil from the rotary electric machine lubricating oil passage is supplied to a coil end disposed on the other side of the stator, and supplied to a coil end disposed on one side of the stator via the oil passage.
14. The hybrid drive device according to claim 10, wherein:
an oil passage is formed on a radially inner side of the rotor so as to extend in an axial direction of the rotor; and
lubricating oil from the rotary electric machine lubricating oil passage is supplied to a coil end disposed on the other side of the stator, and supplied to a coil end disposed on one side of the stator via the oil passage.
15. The hybrid drive device according to claim 11, wherein:
an oil passage is formed on a radially inner side of the rotor so as to extend in an axial direction of the rotor; and
lubricating oil from the rotary electric machine lubricating oil passage is supplied to a coil end disposed on the other side of the stator, and supplied to a coil end disposed on one side of the stator via the oil passage.
16. The hybrid drive device according to claim 12, further comprising:
a resolver disposed on the other side of the flange portion in the axial direction, the resolver having a stationary element integrally provided on the case and a rotary element provided so as to rotate together with the rotor; and
a bracket that fixes the rotary element to an end portion of the cylindrical portion on the other side in the axial direction, wherein
the bracket is formed with a void portion communicated with the oil passage and the coil end disposed on the other side.
17. The hybrid drive device according to claim 13, further comprising:
a resolver disposed on the other side of the flange portion in the axial direction, the resolver having a stationary element integrally provided on the case and a rotary element provided so as to rotate together with the rotor; and
a bracket that fixes the rotary element to an end portion of the cylindrical portion on the other side in the axial direction, wherein
the bracket is formed with a void portion communicated with the oil passage and the coil end disposed on the other side.
18. The hybrid drive device according to claim 14, further comprising:
a resolver disposed on the other side of the flange portion in the axial direction, the resolver having a stationary element integrally provided on the case and a rotary element provided so as to rotate together with the rotor; and
a bracket that fixes the rotary element to an end portion of the cylindrical portion on the other side in the axial direction, wherein
the bracket is formed with a void portion communicated with the oil passage and the coil end disposed on the other side.
19. The hybrid drive device according to claim 15, further comprising:
a resolver disposed on the other side of the flange portion in the axial direction, the resolver having a stationary element integrally provided on the case and a rotary element provided so as to rotate together with the rotor; and
a bracket that fixes the rotary element to an end portion of the cylindrical portion on the other side in the axial direction, wherein
the bracket is formed with a void portion communicated with the oil passage and the coil end disposed on the other side.