The student clearly states the independent variable, which is the frequency of a sound wave ranging from 200 Hz to 1000 Hz, and the dependent variable, the attenuation coefficient of the sound wave. However, the research question lacks a description of the method of analysis, which should explicitly detail how the attenuation coefficient will be measured. The student provides a thorough background theory relevant to sound wave attenuation and explains the choice of techniques and sampling distances effectively. Nevertheless, there is a need for discussion regarding the number of trials selected for data collection, as well as addressing ethical and environmental issues, which are currently not adequately covered in the investigation. Overall, the methodology is well described and allows for reproducibility without any irrelevant information.
