Data on GitHub

From the dataset abstract

MySMARTLife EU project (where Forum Virium is organiser in Helsinki) has been collecting noise data from Helsinki from the beginning of 2018 with accurate CESVA TA-120 noise sensors. The data is distributed in tabular format as CSV files, which contain the average calculated by the sensor per minute and the maximum value of each second in A-weighted dB (dBA).

In addition to CSV files, an experimental Jupyter Notebook file is provided, which can be easily downloaded to your computer for examination and analysis in the Jupyter programming environment.

Source: IoT-meludataa Helsingistä