Acoustic measurement with thermal excitation

• Main Author: Lee, Chek Yen
• Other Authors: Teo Hang Tong Edwin
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2020
• Subjects: Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/139420
• Institution: Nanyang Technological University

The 'wonder material' 3D-graphene (3D-C) is a type of allotropes of carbon with incredible properties that were discovered two decades ago. It is also an excellent electrical and thermal conductor. Many believe the implementation of this potential material can make a massive impact on the current technology. A prototype thermophone has been built in the Cintra lab in NTU using 3D-C. A 3DC thermoacoustic speaker does not require any mechanical vibration to generates sound, unlike other speakers. However, due to unknown reasons, the prototype system has a weak signal to noise ratio (SNR). Hence, to obtain an optimized result, research, investigation, and data collection was done solely on 3D-C. This report starts with an overview of a 3D-C thermophone. Follow by, literature review section clarifies relevant and essential theory from previous studies. The following chapters elaborate on the methodology, and the investigations conducted. The summary and future work were concluded in the last section of the report.