Sound Producing Devices TRIZ Cases

A polymeric holding device uses a spring section to expand parallel to trim panel deformation, maintaining secure attachment of electronic units.

Alternating dual-frequency transmission cycles in a fish finder suppresses interference noise, enhancing echo clarity for accurate detection.

Linear filter extracts howling components from error signals while gain enhancement deemphasizes non-howling content to prevent runaway amplification.

A microperforated wood veneer surface layer bonded to oriented high-density fiberglass absorbs sound energy through viscous friction and thermal conduction.

A sound processing device adjusts acoustic parameters based on the intended reproduction space to generate customized audio data.

Flexible thin film resonators minimize vortex shedding and turbulence in speaker ports, improving sound quality without adding device weight.

Vortex diodes redirect acoustic energy through circulation elements to attenuate sound, enabling integration into three-dimensional components.

A speaker generates masking sound to cancel fan noise in micro devices.

A white good system predicts motor noise and combines it with plain music to create a comfortable ambient sound.

Passive balancing of electroacoustic transducers eliminates active circuitry complexity while enabling full-duplex external sound detection.

Precomputing the secondary path characteristic in a lookup table enables faster convergence and prevents filter divergence during long-distance noise reduction.

Resonant acoustic chambers amplify fundamental frequencies while maintaining harmonic amplitudes, eliminating complex electronics and large speakers.

Variable acoustic openings in drilled septums reduce non-linearity factors across varying flow velocities while maintaining consistent noise attenuation.

Decentralized control sources independently manage transmitted and reflected acoustic components to minimize residual noise across a wide frequency range.

An active noise control device uses adaptive filters to generate canceling sound signals.

Phase delay control steers dual transducer ultrasonic beams to expand detection coverage without reducing range.

A sound absorbing device uses stacked fabric layers to absorb acoustic energy across a broad frequency range.

Segmented transducer assembly with sound-attenuating materials reduces element interference, enhancing sonar image quality.

Three-path audio processing with crosstalk canceling improves virtual sound positioning accuracy while managing device complexity.

Water-based polymer emulsion eliminates hazardous volatile organic compounds while maintaining damping performance and water resistance.

A signal processing system limits audio and noise reduction levels to maintain output quality.

An elliptical reflector localizes a virtual sound image within a projection surface, resolving the misalignment between video display and speaker position.

An audio canceling device generates attenuation signals to reduce unmanned aerial vehicle noise.

Embedding porous amorphous silica agglomerates in a fibrous layer absorbs sound energy across frequencies.

Overload detection module switches active road noise control between adaptive and non-adaptive modes to prevent performance degradation from sensor saturation.

Hexagonal wells with number theoretic depths resolve tri-axial symmetry mismatches in control rooms, reducing comb filtering and improving acoustic uniformity.

Processing sensor data at 2 MHz reduces latency below 2.5 µs, resolving the trade-off between computational complexity and noise cancellation responsiveness.

Arrayed speakers produce a uniform sound pressure field to expand the noise cancellation zone.

An in-ear audio emitter configuration directs soundwaves toward a specific point to generate a target wave radiating into the ear canal.

A network AV receiver switches music data between media servers using time code matching and fading techniques.

A noise removal device calculates statistical parameters to dynamically adjust processing elements for effective signal cleaning.

Forward speakers generate independent anti-phase signals to cancel high-frequency engine noise, accommodating varying passenger positions and postures.

Dynamic transfer functions adapt to vehicle occupancy patterns, resolving suboptimal noise cancellation caused by fixed system configurations.

A composite acoustic window uses elastomeric core layers to transmit high-frequency signals through vessel hulls.

Estimating instantaneous secondary path magnitudes using adaptive filter coefficient differences to update control parameters in real time.

An adaptive noise-canceling circuit updates secondary and leakage path estimates only when source audio magnitude exceeds ambient sound levels.

Spectral matching analyzes ambient excitation patterns to select corresponding pre-recorded sounds, reducing annoyance from high-level masking noise.

A perforated acoustic panel uses shape memory constrictions to dynamically tune sub-chamber geometry for variable frequency noise attenuation.

Velocity-based iterative control suppresses multi-source noise while avoiding amplification in other areas.

A control unit adjusts masking sound levels and intervals to match fluctuating noise trends.

An internal partition plate creates a dedicated pressure relief channel that equalizes air pressure while maintaining waterproofing and preventing blockage.

Metallic bonding and a stiff edge member stabilize resonance frequency across wide temperature ranges, maintaining consistent sound pressure levels.

Segmenting the inverted signal into orthogonal components allows independent parameter adjustment, resolving low-frequency noise cancellation mismatches.

Multi-channel matrix mixer transforms input soundfield signals into acoustically rotated delayed copies for immersive audio rendering.

Porous polymer matrix with 80-99% active particles maintains pore accessibility to resolve acoustic activity compromise in small enclosures.

Variable compensator adjusts transfer function based on earcup coupling differences.

Electromagnetic actuators tune resonant frequencies in membrane-type acoustic metamaterial cells.

A vehicle noise-cancellation system uses a level detector to assess acceleration derivatives and set noise signals to zero during impulsive events.

A feedforward active noise control system converts adaptive filters into digitally-controlled coefficients for DSP implementation.