Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-051105-110646

Document Typethesis
Author NameLaverty, Stephen William
Email Address steve at alum.wpi.edu
TitleDetection of Nonstationary Noise and Improved Voice Activity Detection in an Automotive Hands-free Environment
DepartmentElectrical & Computer Engineering
  • Dr. Donald R. Brown, Advisor
  • Dr. Brian King, Committee Member
  • Dr. John A. McNeill, Committee Member
  • Keywords
  • automobile
  • noise reduction
  • passing vehicle noise
  • hands-free
  • Date of Presentation/Defense2005-04-25
    Availability unrestricted


    Speech processing in the automotive environment is a challenging problem due to the presence of powerful and unpredictable nonstationary noise. This thesis addresses two detection problems involving both nonstationary noise signals and nonstationary desired signals. Two detectors are developed: one to detect passing vehicle noise in the presence of speech and one to detect speech in the presence of passing vehicle noise. The latter is then measured against a state-of-the-art voice activity detector used in telephony. The process of compiling a library of recordings in the automobile to facilitate this research is also detailed.

  • Laverty_2005.pdf

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