In October 2025, the average noise level recorded at the Feldbergstrasse station was 68.7 dB, with a maximum noise level reaching 92.7 dB. The highest noise level was recorded on October 15th, between 3:00 PM and 5:59 PM. The noise levels were also measured at the Grenzacherstrasse station, where the average noise level was 63.6 dB, and the maximum was 90.5 dB. Noise levels between 70 and 80 dB are considered very loud, comparable to the sound of street traffic from close by.

Since 2020, the average noise level at Feldbergstrasse has been 68.7 dB, with a maximum of 92.7 dB and a 99th percentile value of 88.0 dB, indicating occasional spikes in noise levels. Compared to previous years, the average noise level in October 2025 was slightly lower than the 71.3 dB recorded in the same month of 2025. However, the maximum noise level was slightly higher than the 91.8 dB recorded in the same month of 2025. Notably, in 2023, the average and maximum noise levels were significantly lower, both at 24.1 dB, indicating a quiet period.

The highest noise level at Feldbergstrasse was recorded at 91.8 dB on October 15th, 2025, between 3:00 PM and 5:59 PM. The all-time lowest noise level at this station was 24.1 dB, recorded in 2023.

Noise levels are measured in decibels (dB), a logarithmic unit. A 10 dB increase corresponds to a tenfold increase in sound intensity. For context, a quiet room is around 30 dB, normal conversation is about 50–60 dB, and street traffic can reach 70–80 dB.

For more detailed information on noise monitoring, readers can refer to additional sources on noise monitoring.