Important environmental sounds can be almost completely masked while listening to loud music with headphones or earbuds. It is not only inconvenient but quite possibly life threatening. Hundreds of people are injured every year while wearing headphones or earbuds simply because they were cut off from environmental sounds. The problem has been recognized by headphones and earphones manufacturers. However, existing “open microphone” and other similar technologies compromise music quality by allowing external sounds and ambient noises to reach user’s ears.
With Alango ListenThrough™ technology it is possible to listen to clean music, but still be aware of the environment. ListenThrough™ is an alertness feature that allows headphones to pass through only the important sounds blocking ambient noises and without compromising the music experience.
|Acoustic Feedback Suppression (AFC)||Eliminates feedback loop between the transducers and microphones.|
|Noise Suppressor (NS)||Automatically detects and attenuates stationary and transient noises.|
|ListenThrough™||A “smart algorithm” for headphones that allows important environmental sounds (alarm, car horn, train, etc.) to be passed through so that the user can listen to their music and and also remain aware of their environment.|
|Frequency Equalizer (EQ)||Allows adjustment of microphone frequency response with high frequency resolution.|
|Intelligent Mixer||The Intelligent Mixer receives a stereo audio signal and the signal from the ListenThrough block and mixes them according to to respective amplitudes ensuring that important environmental sounds are not too loud while not masked by loud music.|
ListenThrough™ can be integrated with other Alango Technologies, including MuRefiner™ and AVQ-Me™. An integrated block diagram of Alango’s Audio Enhancement Package is shown below. This is an ideal solution for portable audio devices.
Plantronics “OPENMIC” definition: http://www.plantronics.com/us/support/terminology.jsp