Why are low frequencies difficult to treat?
Acoustics is a fluid dynamic. Unfortunately, it is impossible to see what is happening with small pressure waves in air.
Waves in water are a good analogy and the 2 pictures hereunder make it easy to understand why short wavelengths are easy to deal with and big wave lengths are not.
![kick drum](https://www.psiaudio.swiss/wp-content/uploads/2023/03/kick-drum.jpeg)
Short wave lengths (high frequencies), only require small devices to interact with them.
![Short wavelength Short wave length](https://www.psiaudio.swiss/wp-content/uploads/2023/03/Short-wavelength.jpg)
Large wave lengths, require large objects to interact with them.
![Large wavelength](https://www.psiaudio.swiss/wp-content/uploads/2023/03/Large-wavelength.jpg)
It typically requires an object the size of a quarter of the wave length to be able to interact with a certain frequency:
- 0.4 cm for 20’000 Hz
- 85 cm for 100 Hz
- 4 m for 20 Hz
If you have problems in the low frequencies and do not have enough space to install passive material, our AVAA technology can help.