Resonator silencers
In gas-filled pipes with pulsating excitation, very high sound pressure levels with pronounced peaks usually occur. In addition to the low-frequency fundamental modes, which often determine the overall level, the spectral profile of such levels is characterised by a multitude of overtones, which cause the entire gas-filled structure to radiate sound. Effective reduction of exhaust noise is not possible without sufficient damping, especially of the low frequencies.
The achievable noise reduction of reflection silencers is determined by the arrangement of the damping chambers in relation to each other and by the ratio of the cross-sectional areas between the individual chambers and the inlet pipe. This means that, if the initial spectrum and the exact gas parameters are known, the silencer can be optimally adapted to each application (i.e. to the available space, the permissible pressure loss, each frequency, narrowband or broadband).
Its use allows very low to medium frequencies to be effectively dampened in gas-flowing pipes with a small size. In-house computer programmes are used for design purposes, the performance of which has been confirmed by numerous measurements on completed silencers.
Application-specific considerations:
Wide range of applications, e.g. after combustion engines, in compressor circuits, before and after rotary lobe blowers, in exhaust chimneys and exhaust systems, etc. No fibre material required, i.e. easy to clean, no contamination of the medium Available in all nominal diameters and nominal pressures required in practice Very compact design with maximum attenuation Broadband attenuation when combined with absorption silencers Effective attenuation of resonance phenomena in pipe systems.
Enquiry details:
- Technical data on the sound source
- Medium, operating density, isentropic exponent
- Gas temperature at the installation location of the silencer [°C]
- Pressure in the pipe [bar ü]
- Spectral curve of the sound pressure level in the pipe [dB(A)]
- Required level reduction [dB]
- or permissible sound power level behind the silencer [dB(A)]
- Permissible pressure loss [bar]
- Additional information:
- Pipeline configuration and connection
- Maximum permissible silencer dimensions (diameter x length)
Product range:
- Structure-borne noise and vibration insulation (KSD® elements, etc.)
- Blow-out silencers for all media
- Pipeline and resonator silencers
- Soundproof hoods
- Cooling tower silencers
- Gas turbine silencers
- Exhaust silencers
- Design and delivery of complete systems
