WEARABLE COMMUNICATION DEVICE
Embodiments relate generally to wearable electrical and electronic hardware, computer software, wired and wireless network communications, and to wearable/mobile computing devices configured to process audio, in view of noise, and communicate audio. More specifically, disclosed are wearable devices, platforms and methods directed to, for example, provide wearable communication devices, such as a headset. In various embodiments, a wearable communication device includes an array of microphone, an audio processor coupled to the array of microphones, and a vibration detector including, for example, a skin surface microphone (“SSM”).
1 . A wearable communication device comprising:
an array of microphones;
an audio processor coupled to the array of microphones; and
a vibration detector comprising:
an acoustic energy receiver;
an interface portion configured to contact a surface including vibratory energy associated with speech;
a pressure wave converter configured to encode characteristics of the vibratory energy in pressure waves; and
a transfer conduit configured to convey the pressure waves to the acoustic energy receiver.
2 . The wearable communication device of claim 1 wherein the array of microphones and the acoustic energy receiver comprise:
MEMS (“Micro-Electrical-Mechanical System”) microphones comprising a semiconductor substrate and a diaphragm coupled to the semiconductor substrate.
3 . The wearable communication device of claim 1 wherein the vibration detector comprises:
a skin surface microphone (“SSM”).
4 . The wearable communication device of claim 1 further comprising:
a earbud engagement member including one or more members configured to engage an earbud to lock the orientation of the earbud relative to the wearable communication device.
5 . The wearable communication device of claim 4 further comprising:
a housing; and
a speaker channel housing configured to convey audio, the speaker channel housing comprising:
the earbud engagement member.
6 . The wearable communication device of claim 1 further comprising:
a earbud comprising:
an ear engagement member configured to couple the wearable communication device to an ear; and
an acoustic chamber between a housing of the wearable communication device and an output port of the earbud.
7 . The wearable communication device of claim 6 further comprising:
a system of earbud including the earbud, each of which have different size dimensions,
wherein an acoustic enclosure volume for each of a plurality of acoustic chambers for the system of earbuds are substantially the same.
8 . The wearable communication device of claim 1 further comprising:
a speaker; and
an audio processor comprising:
a noise suppression unit; and
an SSM Voice Activity Detector (“VAD”) coupled to the noise suppression unit and configured to detect speaker acoustic energy from the speaker,
wherein the SSM VAD filters the speaker acoustic energy.
9 . The wearable communication device of claim 1 further comprising:
an audio processor comprising:
a speech state detector configured to detect a speech state in which the audio processor modifies audio processing as a function of the speech state.
10 . The wearable communication device of claim 1 further comprising:
an audio processor comprising:
a band selector configured to select one of a number of frequency bands with which to transmit audio.
11 . The wearable communication device of claim 1 further comprising:
a speaker; and
an audio processor comprising:
an audio type detector configured to detect a type of audio received, and to control the generation of low-frequency bass signals at the speaker.
12 . The wearable communication device of claim 1 wherein the array of microphones and the acoustic energy receiver comprise:
MEMS microphones having substantially matching frequency responses that vary less than 1 dB.
13 . A wearable communication device comprising:
a speaker;
an array of omnidirectional microphones comprising:
MEMS (“Micro-Electrical-Mechanical System”) microphones;
a vibration detector comprising:
an skin surface microphone (“SSM”) including a MEMS microphone; and
an audio processor to the vibration detector, the audio processor comprising:
a noise suppression unit; and
an SSM Voice Activity Detector (“VAD”) coupled to the noise suppression unit and configured to detect speaker acoustic energy from the speaker,
wherein the SSM VAD modifies operation of the noise suppression unit to compensate for the speaker acoustic energy.
14 . The wearable communication device of claim 13 further comprising:
a speech state detector configured to detect a speech state in which the audio processor modifies audio processing as a function of the speech state.
15 . The wearable communication device of claim 14 wherein the speech state comprises:
data representing the speech state as one of a first state in which no speech is detected, a second state in which speech from two or more audio sources are detected, a third state in which speech is originating at the wearable communication device, and a fourth state in which speech originates remotely relative to the wearable communication device.
16 . The wearable communication device of claim 13 further comprising:
a band selector configured to select one of a number of frequency bands with which to transmit audio.
17 . The wearable communication device of claim 13 further comprising:
an audio type detector configured to detect a type of audio received, and to control the generation of low-frequency bass signals at the speaker.
18 . The wearable communication device of claim 13 further comprising:
a housing; and
a speaker channel housing configured to convey audio, the speaker channel housing comprising:
an earbud engagement member configured to engage an earbud to lock the orientation of the earbud relative to the wearable communication device.
19 . The wearable communication device of claim 13 wherein the vibration detector further comprises:
an interface portion configured to contact a surface including vibratory energy associated with speech;
a pressure wave converter configured to encode characteristics of the vibratory energy in pressure waves; and
a transfer conduit configured to convey the pressure waves to the acoustic energy receiver.
20 . The wearable communication device of claim 13 wherein the transfer conduit comprises:
a tube having dimensions tuned to facilitate transfer of the pressure waves in a range of pressure wave characteristics.