Please use this identifier to cite or link to this item:
Title: A study of the characteristics of wheeze, cough, and speech sounds
Authors: Ng, Celestine RuiTing
Keywords: DRNTU::Engineering
Issue Date: 2018
Abstract: Over the years, many studies have developed signal processing algorithms to automatically detect the presence of wheeze in a controlled environment. However, little research was done in a practical environment where a mixture of other sounds such as cough and speech could be present. The objective of this project was to study the characteristics of sounds produced by wheeze, cough and speech. Feature extraction methods used for this research was Mel-Frequency Cepstral Coefficients (20 MFCCs), Entropy Mean, Entropy Difference and Entropy Ratio. Out of the 23 features extracted by the mentioned proposed feature extraction algorithms, 2 best features were selected using Fisher’s Ratio method with a threshold value of 0.5. Characterisation was done using a 2-Dimensional (2D) representation and data samples were modelled in rectangular shape, then further enhanced to a rotated ellipse. A validation test was carried out to measure the overall characterisation accuracy for the elliptic model which yielded a percentage of approximately 92.2%. The project was further improved beyond its scope, and a simple classification method was used. This was done by plotting linear lines to distinctively separate the classes of sounds into different regions. The accuracy of the classification method used in this project was approximately 88.84%.
Schools: School of Electrical and Electronic Engineering 
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:EEE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
CelestineNg_U1521015G_FYP Final Report.pdf
  Restricted Access
4.16 MBAdobe PDFView/Open

Page view(s)

Updated on Jun 18, 2024

Download(s) 50

Updated on Jun 18, 2024

Google ScholarTM


Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.