Feeds

Bluetooth headsets to get dual mics

Aussie developers use secondary mics for noise suppression

The Power of One Brief: Top reasons to choose HP BladeSystem

Adding a second microphone to a Bluetooth headset significantly improves its ability to capture speech by making it more effective at noise cancellation and suppression, according to Australian audio software developer Dynamic Hearing.

The company has added a multi-mic feature called VoiceField to its Atlas audio processing software for CSR's Bluetooth silicon. VoiceField uses two microphones, one in the usual place to capture the user's speech, and the other located elsewhere to pick up the background noise.

The software in effect subtracts the latter from the former, leaving what Dynamic Hearing's CEO, Dr Elaine Saunders, called "an extremely clean transmit signal".

This multi-mic idea is not new, but it requires memory and a fair chunk of compute power to process the audio streams. Dynamic Hearing said it chose CSR because CSR's BlueCore5-Multimedia chip has both memory and a DSP (digital signal processor) built-in.

Saunders added that VoiceField is the latest addition to Atlas, whose software features already include acoustic echo suppression, automatic handsfree volume control, and programmable equalisation in 33 frequency bands of both the transmitted and received audio signal.

CSR software marketeer Gemma Paris said that several CSR customers are developing multi-mic headsets for release later this year. She said that the Atlas software would be rolled up with software from CSR itself and flashed onto the headsets during production. ®

Application security programs and practises

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.