Helmet for communication in extreme wind and environmental noise
An apparatus including a multi-sensor array having a bone conduction microphone, air conduction microphone, signal processor, and speakers; a signal processor that processes vibration signal data and tonal signal data to produce combined data representative of the vocal communication to substantially reduce or eliminate noise; and a method of applying a signals optimized combination algorithm to optimize the output by intelligently combining the outputs from the two different types of sensors for both working in a noisy environment and quiet environment.
1. An apparatus, comprising:
a bone conduction microphone that obtains vibration signal data;
an air conduction microphone that obtains tonal signal data; and
a signal processor that processes the vibration signal data and the tonal signal data, to produce combined data representative of a vocal communication that substantially reduces or eliminates at least one of a first noise associated with the vibration signal data or a second noise associated with the tonal signal data;
wherein the vibration signal data is represented as a first fast fourier transform of the vibration signal, wherein the tonal signal data is represented as a second fast fourier transform of the tonal signal, and wherein the signal processor processing the vibration signal data and the tonal signal data to produce the combined data comprises the signal processor determining whether a first running average energy of the vibration signal is greater than a second running average energy of the tonal signal.
2. The apparatus of claim 1 , wherein the signal processor processing the vibration signal data and the tonal signal data to produce the combined data further comprises,
in response to the first running average energy being determined to be greater than the second running average energy, applying a non-linear Fuzze function of the second running average energy divided by the first running average energy.
3. The apparatus of claim 1 , wherein the signal processor processing the vibration signal data and the tonal signal data to produce the combined data further comprises,
in response to the first running average energy being determined to be less than the second running average energy, applying a non-linear Fuzze function of the first running average energy divided by the second running average energy.
4. The apparatus of claim 1 , further comprising a cushioned bendable material integral with, or attachable to, an inside of a top part of a protective headgear.
5. The apparatus of claim 4 , wherein the signal processor processing the vibration signal data and the tonal signal data to produce the combined data further comprises,
in response to the first running average energy being determined to be greater than the second running average energy, applying a non-linear Fuzze function of the second running average energy divided by the first running average energy.
6. The apparatus of claim 4 , wherein the signal processor processing the vibration signal data and the tonal signal data to produce the combined data further comprises,
in response to the first running average energy being determined to be less than the second running average energy, applying a non-linear Fuzze function of the first running average energy divided by the second running average energy.
7. An apparatus, comprising:
a compressible foam material;
a bone conduction microphone embedded in the compressible foam, wherein the bone conduction microphone senses a vibration signal;
an air conduction microphone that senses tonal signal data by air; and
a signal processing unit that processes the vibration signal and the sound signal, to generate a combined signal representative of a vocal sound that substantially reduces at least one of a first noise associated with the vibration signal or a second noise associated with the sound signal, and that outputs the combined signal from the apparatus to a device for further use or processing,
wherein the signal processing unit processing the vibration signal data and the tonal signal data to produce the combined data comprises the signal processing unit enhancing a defined high frequency band of frequencies represented in at least the vibration signal data.
8. The apparatus of claim 7 , wherein the compressible foam material is attachable to a top part of gear that is wearable by a head of a user.
9. The apparatus of claim 8 , wherein the bone conduction microphone being conduction microphone from mechanical vibrations resulting from wind on the gear or air vibrations resulting from external sound on the gear from external environment sound generated outside of the gear.
10. The apparatus of claim 7 , wherein the air conduction microphone is not comprised in the compressible foam material, and wherein the air conduction microphone is positioned away from the bone conduction microphone in order to receive the vocal sound of a user of the apparatus by air.
11. An apparatus, comprising:
a compressible foam material;
a bone conduction microphone embedded in the compressible foam, wherein the bone conduction microphone senses a vibration signal;
an air conduction microphone that senses a sound signal by air; and
a signal processing unit that processes the vibration signal and the sound signal, to generate a combined signal representative of a vocal sound that substantially reduces at least one of a first noise associated with the vibration signal or a second noise associated with the sound signal, and that outputs the combined signal from the apparatus to a device for further use or processing,
wherein the combined signal is output from the apparatus to the device for at least one of performing a command by the device associated with a voice command determined to be present in the vocal sound of the combined signal, storing the vocal sound by the other device, or communicating the vocal sound to at least one other device in communication with the device.
12. The apparatus of claim 11 , wherein the compressible foam material is attachable to a top part of gear that is wearable by a head of a user.
13. The apparatus of claim 12 , wherein the bone conduction microphone being conduction microphone from mechanical vibrations resulting from wind on the gear or air vibrations resulting from external sound on the gear from external environment sound generated outside of the gear.
14. The apparatus of claim 11 , wherein the air conduction microphone is not comprised in the compressible foam material, and wherein the air conduction microphone is positioned away from the bone conduction microphone in order to receive the vocal sound of a user of the apparatus by air.
15. An apparatus, comprising:
a compressible foam material;
a bone conduction microphone embedded in the compressible foam wherein the bone conduction microphone senses a vibration signal;
an air conduction microphone that senses a sound signal by air; and
a signal processing unit that processes the vibration signal and the sound signal, to generate a combined signal representative of a vocal sound that substantially reduces at least one of a first noise associated with the vibration signal or a second noise associated with the sound signal, and that outputs the combined signal from the apparatus to a device for further use or processing,
wherein the bone conduction microphone being embedded in the compressible foam material comprises the bone conduction microphone being encased by at least one silicon layer, resulting in an encased bone conduction microphone in the compressible foam material that makes contact with a user vertex through a cutout in the compressible foam material.
16. The apparatus of claim 15 , wherein the compressible foam material is attachable to a top part of gear that is wearable by a head of a user.
17. The apparatus of claim 16 , wherein the bone conduction microphone being conduction microphone from mechanical vibrations resulting from wind on the gear or air vibrations resulting from external sound on the gear from external environment sound generated outside of the gear.
18. The apparatus of claim 15 , wherein the air conduction microphone is not comprised in the compressible foam material, and wherein the air conduction microphone is positioned away from the bone conduction microphone in order to receive the vocal sound of a user of the apparatus by air.
19. The apparatus of claim 15 , wherein the encased bone conduction microphone protrudes from the cutout in the compressible foam material to make a pressured contact with a head of a user at the user vertex.
20. The apparatus of claim 19 , wherein the compressible foam material is attachable to a top part of gear that is wearable by the head of the user.
21. The apparatus of claim 20 , wherein the bone conduction microphone being embedded at the top portion substantially isolates the vibration signal sensed by the bone conduction microphone from mechanical vibrations resulting from wind on the gear or air vibrations resulting from external sound on the gear from external environment sound generated outside of the gear.
22. The apparatus of claim 19 , wherein the air conduction microphone is not comprised in the compressible foam material, and wherein the air conduction microphone is positioned away from the bone conduction microphone in order to receive the vocal sound of the user by air.