A relatively new development from VocalZoom, a voice communications company based in Israel, involves the use of a combination of microphone and optical sensor to drastically improve voice communication in noisy environments.
Named “SEEON” or Speech Enhancement Electro Optical Microphone, the new technology aims to offer 20-40dB of noise reduction in situations such as high volume industrial workplaces, busy cityscapes and parties.
The technology is being produced in two variations:
SEEON-SR: For short reach applications such as on wired and wireless headsets where the device is consistently aimed at the face (around 5cm.)
SEEON-FR: To be used up to 1m away, this is more suitable for use in pc/mobile computing and the automotive industry where a wider pick-up pattern might be necessary (up to 60 degrees).
VocalZoom provide a description of how their technology is able to improve speech intelligibility on their website:
“VocalZoom’s unique optical sensor, which is unaffected by acoustic noise, gathers additional information directly on the target speaker and enables unparalleled noise-reduction capabilities. The result is clearer, more intelligible voice communications, even in high ambient noise environments.”
Courtesy of VocalZoom
The optical sensor (an eye-safe laser) is able to measure vibrations on the surface of the speakers skin, providing amplitude and frequency information that can be converted to an audible signal. The signals received from both microphones (a dual microphone is used) and the optical sensor can then be processed together to amplify the target sound source while reducing the level of unwanted background noise.
The effect the device can have on improving intelligibility is noted in the example below:
“In tests performed in a vehicle moving at 60 MPH and with background voices, VocalZoom’s technology enabled the ASR engine to maintain rates of 60%-95%, compared to 0%-45% without VZ’s technology.”
Courtesy of VocalZoom
We look forward to hearing more about this exciting technology in the future. Check out the demo recordings on the VocalZoom website that show off the technologies capabilities.
