| 摘要 |
The present invention relates to a desktop speakerphone constructed to make the desktop speakerphone less space-consuming while having improved audio qualities. The desktop speakerphone preferably has two microphone clusters 6, 7 mounted at the upper side of the housing 2 closer towards respective longitudinal ends 8 of the latter, so that each microphone cluster 6, 7 can receive voice sound Av from one or more of the users. Each microphone cluster 6, 7 preferably comprises three pressure microphones 10, 11, 12. Furthermore, within each microphone cluster 6, 7, the second and third sound inlets 14, 15 are preferably arranged symmetrically on opposite sides of the respective median plane 18. Within each microphone cluster 6, 7, the relative arrangement of the three sound inlets 13, 14, 15 defines a respective microphone axis 9, 19 for each of the microphone pairs 10, 11, 10, 12. The microphone axis 9 of the first microphone pair 10, 11 extends through the first and the second sound inlet 13, 14, while the microphone axis 19 of the second microphone pair 10, 12 extends through the first and the third sound inlet 13, 15. The microphones are connected to multiple array processors, each configured to provide an array signal in dependence on two or more of the multiple microphone signals. First and second array processor configured to provide array signals in dependence on microphone signals. |
| 主权项 |
1. A desktop speakerphone comprising:
a housing with a support surface for supporting the desktop speakerphone on a horizontal surface; an output path configured to provide a driver signal in dependence on an audio output signal; a sound driver arranged at the housing and configured to emit speaker sound in dependence on the driver signal; one or more microphone clusters each comprising multiple microphones configured to provide respective microphone signals in dependence on received voice sound; and an input path configured to provide an audio input signal in dependence on the multiple microphone signals,wherein the input path comprises multiple array processors, each configured to provide an array signal in dependence on two or more of the multiple microphone signals, and wherein the input path further is configured to provide the audio input signal in dependence on two or more array signals,wherein for each microphone cluster the input path comprises:
a first array processor configured to provide a first one of the two or more array signals in dependence on a first pair of microphone signals, the first array signal having a first directivity pattern with a main lobe oriented in a first direction; and a second array processor configured to provide a second one of the two or more array signals in dependence on a second pair of microphone signals, the second array signal having a second directivity pattern with a main lobe oriented in a second direction different from the first direction,wherein each of the first and the second directivity patterns exhibits reduced sensitivity towards the sound driver,characterized in thateach of the one or more microphone clusters further comprises:
a first pressure microphone configured to provide a first microphone signal in dependence on voice sound received at a first sound inlet arranged at the housing; a second pressure microphone configured to provide a second microphone signal in dependence on voice sound received at a second sound inlet arranged at the housing; and a third pressure microphone configured to provide a third microphone signal in dependence on voice sound received at a third sound inlet arranged at the housing,and further in that for each of the one or more microphone clusters:
the first pair of microphone signals comprises the first microphone signal and the second microphone signal; the second pair of microphone signals comprises the first microphone signal and the third microphone signal; and the second and third sound inlets are arranged on mutually opposite sides of a median plane for the respective microphone cluster,wherein for each microphone cluster the median plane extends through the first sound inlet and further comprises a center line that extends perpendicular to the support surface through the acoustic center of the sound driver. |
