Signal Processing and Speech Communication Laboratory
homestudent projects › Pop Sound Protection and Reduction for Small Microphone Enclosures

Pop Sound Protection and Reduction for Small Microphone Enclosures

Status
Finished
Type
Bachelor Project
Seminar Type
Speech Processing, Seminar (3 SE)
Announcement date
22 May 2013
Student
Martin Blaß & Michael Pirolt
Mentors
Research Areas

Short description

Pop Filter Pop sounds are a common problem in audio signal acquisition. They occur when the diaphragm of the microphone is deflected too much. This effect introduces significant distortion to the signal. Several approaches to reduce the are available, but they only work at a certain size of distance to the diaphragm.

We are interested in pop reduction and suppression for microphones in very small enclosures, such as mobile phones or dictation devices, where there is no room for conventional pop protection. This kind of devices are often used for automatic speech recognition and pop sound distortions significantly increase the word error rate.

You should provide an overview of the state-of-the-art for pop protection at different stages in the signal processing chain:

  • Acoustic/mechanical approaches
  • Signal processing
  • Speech recognition

Your tasks

  • Review of literature
  • Documentation

Your profile/prerequisites

  • Audio engineering
  • Signal Processing

Contact

Martin Hagmüller (hagmueller@tugraz.at or 0316 - 873 4377)