Abstract in simplified Chinese:揭露了一种用于耳机离耳侦测的信号处理器。信号处理器包括音频输出,用于向耳罩中的耳机扬声器传输音频信号。信号处理器还包括反馈(FB)麦克风输入,用于接收来自耳罩中的FB麦克风的FB信号。信号处理器还包括离耳侦测(OED)信号处理器,用于判定FB信号在OED讯框上的音频频率响应作为接收到的频率响应。OED处理器亦判定音频信号的音频频率响应乘以耳机扬声器和FB麦克风之间的离耳转移函数作为理想离耳响应。产生将接收到的频率响应与理想离耳频率响应进行比较的差异量度。使用差异量度来侦测耳罩何时从耳朵脱离。
Abstract in simplified Chinese:一种校准耳机之方法可包含:将一主动噪音消除(ANC)耳机固定到一校准设备,该校准设备包含被配置成支承该ANC耳机之一人耳模型,该人耳模型具有被配置成在解剖学上相似于一人类耳道之一耳道、以及被配置成在解剖学上相似于一人类耳甲之一耳甲,该耳道自该耳甲延伸到该耳道之一内端;该ANC耳机根据一参考音调产生一音频信号;决定该音频信号的一特性;将该音频信号的该特性与一被预先决定的参考特性比较;以及根据该比较而调整该ANC耳机之一增益值。亦揭露了额外的方法及设备。
Abstract:
An audio system having low latency includes a digital audio processor as well as sensor inputs coupled to the processor. The sensor inputs may be microphone inputs. The audio processor operates at the same frequency as the sensor inputs, which is typically much higher than an audio signal provided to the audio processor. In some aspects the audio processor operates as a noise cancellation processor and does not include an audio input.
Abstract:
A method for forming a complete ring network of a plurality of Bluetooth speakers, the method including populating a configurable speaker register of each of the plurality of Bluetooth speakers with an address of an upstream Bluetooth speaker that is in the plurality of Bluetooth speakers, populating the configurable speaker register of each of the plurality of Bluetooth speakers with an address of a downstream Bluetooth speaker that is in the plurality of Bluetooth speakers, and coupling an audio source to one Bluetooth speaker of the plurality of Bluetooth speakers.
Abstract:
A method for forming a complete ring network of a plurality of Bluetooth® speakers, the method including populating a configurable speaker register of each of the plurality of Bluetooth® speakers with an address of an upstream Bluetooth® speaker that is in the plurality of Bluetooth® speakers, populating the configurable speaker register of each of the plurality of Bluetooth® speakers with an address of a downstream Bluetooth® speaker that is in the plurality of Bluetooth® speakers, and coupling an audio source to one Bluetooth® speaker of the plurality of Bluetooth® speakers.
Abstract:
A system and method dynamically selects digital-to-analog (DAC) circuit elements to provide a true differential-output delta-sigma (ΛΣ) DAC. The sign and magnitude m of a received N-b.it input code is determined. If the input code comprises a positive value, m + r circuit elements are selected from a plurality of circuit elements by a positive element selector, in which comprises a number of rotational elements, and r circuit elements are selected by a negative element selector. Each selected circuit element comprises a circuit, element that was not selected for an immediately preceding received input code and has a corresponding minimum usage count value. If the input digital code comprises a negative value, m + r circuit elements are selected by the negative element selector, and. r circuit elements are selected by tile positive element selector. The circuit elements are capable of being configured as positive or negative circuit elements.
Abstract:
The disclosure includes a headset comprising one or more earphones including one or more sensing components. The headset also includes one or more voice microphones to record a voice signal for voice transmission. The headset also includes a signal processor coupled to the earphones and the voice microphones. The signal processor is configured to employ the sensing components to determine a wearing position of the headset. The signal processor then selects a signal model for noise cancellation. The signal model is selected from a plurality of signal models based on the determined wearing position. The signal processor also applies the selected signal model to mitigate noise from the voice signal prior to voice transmission.