Sample interview questions: Can you explain the concept of sound transmission coefficients and their measurement?
Sample answer:
Concept of Sound Transmission Coefficients
Sound transmission coefficients quantify the efficiency of a material or structure in transmitting sound energy. They are defined as the ratio of the sound pressure or intensity transmitted through a material to the incident sound pressure or intensity. Transmission coefficients are typically frequency-dependent and are characterized by two main parameters:
- Transmission Loss (TL): The difference in sound pressure levels between the incident and transmitted sound.
- Transmission Coefficient (TC): The ratio of the transmitted sound pressure to the incident sound pressure.
Measurement of Sound Transmission Coefficients
Sound transmission coefficients are measured using specialized techniques that involve generating a controlled sound field on one side of the material and measuring the sound field on the other side. Common methods include: