The SpeedComfort makes less than 20 dB(A) of noise, which is quieter than rustling leaves. Most people barely hear the SpeedComforts running, if at all. If you still find the noise disturbing, feel free to contact us at support-uk@speedcomfort.com! We have an adapter with lower voltage available, which makes the fan run more quietly and, especially for the most sensitive listeners, produces even less noise.