Noise Suppression TRIZ Cases

See how a holed duct wall with external noise-absorbing material reduces air current noise by 5

See how external channel placement in thermal conditioning silencers improves filling and drain

See how a duct with holed wall and noise-absorbing member reduces air current noise without req

See how a buffered primary-secondary air conditioner separates compressor noise from the user u

See how a removable baffle insert with labyrinth channels and acoustic foam reduces HVAC noise

See how a diamond-cage foam muffler attenuates radon system noise by 8-12 dB without airflow lo

See how modular resonator chambers with tunable air passage openings attenuate noise below 350

See how sound-absorbing air-flow guidance members and fan enclosure surfaces reduce noise from

See how positioning resonance silencers within λ/2 of the sound source enables wide-band low-fr

See how perforated layers and spacers form tunable acoustic metamaterial stacks that attenuate

See how a three-medium buffer zone isolates the noisy compressor from mobile units, cutting noi

See how a heat transfer member in a resin-housed silencer prevents rear-space condensation with

See how spin-welded resin silencer components with circumferential ribs and expanded pipe porti

See how a compact acoustic resonator at the duct endpoint reflects sound waves at target freque

See how segmented permeability in a porous flow passage wall reduces wind noise and pressure lo

See how fusible tie bands made from thermoplastic polyurethane overcome nylon's low friction an

See how symmetrical λ/4 resonator channels absorb 30-60 dB of low-frequency ventilation noise w

See how stacked micro-perforated panels create anisotropic acoustic metamaterials that reduce H

See how a hybrid silencer combines Helmholtz resonators and absorptive materials to attenuate b

See how self-forming foam fills gaps around compressors to reduce sound by 15% at lower cost th

See how a membrane integrated into the duct wall, oriented parallel to airflow, suppresses fan

See how combined quarter-wave tube and Helmholtz resonator sections attenuate blade-pass freque

See how cavity-depth-to-opening-width ratios above 1 and porous materials with controlled flow

See how a dual-channel divider with rounded and acute-angled profiles minimizes noise, pressure

See how strategic positioning of a resonance soundproof structure exploits phase interference t

See how high-airflow-resistivity polymeric foam with conical through holes achieves better soun

See how nested tube structures with optimized cross-sectional areas achieve wide-band transmiss

See how combined quarter wave tube and Helmholtz resonator sections attenuate blade pass freque

See how encircling Helmholtz resonators embedded in duct walls achieve broadband sound attenuat

See how step-shaped recesses with expanded clay coating reflect and absorb sound waves in fume

See how an oblique header pipe with elastically deformable seal section prevents air leakage, e

See how a non-linear trailing edge on HVAC sound baffles reduces turbulent recirculation by 50%

See how an oil separator integrates resonant chambers and sound-absorbing materials to reduce c

See how a resonator arrangement tuned to fluid flow rate maintains transmission loss and preven

See how a membrane-type resonance structure muffles fan noise without generating wind noise by

See how cross-sectional area variation in connected tubes achieves wide-band transmission loss

See how multiple smaller-diameter gas-supplement holes arranged along the screw contour reduce

See how interlocking ribs and channels enable polymeric matting to fold and secure itself, redu

See how adjusting low- and medium-frequency spectral components reduces psychoacoustic sharpnes