Audio Accessories
Voice Enhancement

Applications  / Audio Accessories  / Voice Enhancement








Alango’s comprehensive portfolio of pre/post processing digital technologies are built to enhance the fidelity of the user’s voice during voice communication. Alango’s algorithms have been developed over many years and are adept at mitigating against stationary and transient noises, wind noise and acoustic echo. Some of the applications include Bluetooth headsets, speakers, headphones and smartwatches.

Mobile audio accessories come in many varieties and designs, which often benefit from innovative voice enhancement solutions.

Alango has the know-how and has implemented optimal voice enhancement in a wide range of devices within the mobile audio accessory category.



Block Diagram






  Adaptive Directional Microphone (ADM)  

Two or more microphones in the device are positioned to adaptively discriminate between speech and noise utilizing Alango's beamforming algorithms.

  Acoustic Echo Canceller (AEC)  

Eliminates acoustic echo with multi-band residual echo suppressor ensuring full-duplex communication with minimal voice distortions.

  Noise Suppressor (NS)   Detects and attenuates stationary and transient noises (traffic, pub, passing cars, etc.) in transmitted and received signals.  
  Automatic Gain Control (AGC) and Dynamic Range Compressor (DRC)  

Equalizes voice levels in the microphone and loudspeaker signals ensuring clear intelligibility. Alango AGC technology is robust to ambient noises and allows fast signal equalization without increasing ambient noises.

  Frequency Equalizer (EQ)  

Allows fine frequency adjustment of microphone and loudspeaker frequency responses with high frequency resolution.


Slows down incoming speech in real time improving intelligibility of fast talkers, foreign language, mailbox and numbers.

  Automatic Volume & Equalization (AVQ)  

Modifies the loudspeaker signal according to the ambient noise level and spectrum providing perceptually equal loudness and intelligibility in dynamically changing conditions (street, bus, train, etc.).

  Packet Loss Concealment (PLC)   PLC is a technique used to mask the effects of lost or discarded packets. The objective of PLC is to reconstruct a synthetic signal to cover missing data in a received bit stream and thus hide transmission losses.  





  • Optimal usage of available resources and minimal power consumption.
  • Adaptable to a multitude of different designs.
  • Ported to all major computational platforms.



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