Audio company Sennheiser Communications has launched a range of wireless handsets at this year's CeBIT show in Hanover.

The first is the BW 900, a Bluetooth headset that can connect to a base station hooked up to a regular phone line, or to any Bluetooth-enabled mobile phone.

Andreas Bach, general manager of Sennheiser, said: "The new platform offers a range of features to the benefit of office phone and mobile phone users.

"It supports traditional single-microphone as well as more complex dual-microphone systems, enabling us to create adaptive and speech/voice optimised noise reduction and speech clarity systems."

The second addition is the VMX 100, a Bluetooth headset designed to work with Sennheiser's VoiceMax dual-microphone technology.

VoiceMax uses two microphones and advanced digital signal processing to distinguish speech from other noises. The company claims that sounds such as wind, traffic, machinery or the murmur of a crowd are effectively eliminated.

The system also works on the incoming part of the call and filters background noise from incoming calls, enabling users to better hear what is being said.

"It effectively improves the quality of mobile phone conversations and adapts to user behaviour in most call situations," said Bach. "This eliminates the need for constant manual adjustments, making it as easy to use as it is to wear."

Both devices use Sennheiser's Adaptive Intelligence technology which allows users to walk and talk from one sound environment to another, while intelligently adjusting headset settings.

The units also 'remember' the personal comfort levels of the user in particular situations, and adapts to the preferences in similar sound environments.

The BW 900 will be available from May and the VMX from June.