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Tunable Helmholtz resonator

PTB-News 1.2017
Especially interesting for

room acoustics experts

professional recording studios

noise protection in industry

Here, disturbing resonance frequen-cies in the staircase were significantly reduced thanks to the new Helmholtz resonator.

Whether you are a high-end music connoisseur in your living room or a record-ing engineer in your recording studio, you both know them well – the location-dependent low-resonance frequencies which can be extremely unpleasant when listening to music. Low-frequency noise originating from machines can be similarly amplified in industrial locations due to room resonances. With PTB's invention – a tunable Helmholtz resonator which can be finely adjusted according to the ambient environment – it is possible to optimize room acoustics in the low-frequency range.
A pre-dimensioned module the size of a medium loudspeaker combined with an element which allows adjustment to the room's resonance frequencies can considerably reduce low-resonance frequencies in the range from 20 Hz to 200 Hz. (Technology Offer 0346)


reduces the disturbing effect of room resonance frequencies

enhanced listening experience thanks to balanced bass reproduc tion

Contact person for questions about technology transfer

Andreas Barthel,
Phone: +49 (0)531 592-8307,