Sound Producing Devices TRIZ Cases

Embedded tubes in a Helmholtz resonator body reduce structural thickness while maintaining broadband noise absorption across multiple frequencies.

A holographic metamaterial mode converting structure transforms acoustic radiation field profiles through volumetric distribution of material properties.

Interdispersed MAX phase solids and high-temperature metals provide damping while resisting thermal degradation.

A compressor reduces reference signal amplitude above a threshold before adaptive filtering.

An acoustic Fresnel zone plate lens focuses waves onto sensors to enhance directional sensitivity in underwater environments.

A holographic directional sound device uses a flat plate with unit cell grooves to control acoustic radiation angles via surface admittance.

A transducer array uses a larger aperture width for the transceiver than for the receivers to transmit and receive acoustic signals.

An electronic pet trainer records sound frequency and timing data to enable precise feedback intervals for professional training.

A sound absorbing material utilizes phase transitions to dissipate acoustic energy, resolving the contradiction between high performance and compact size.

Sealed chassis cooling chambers dissipate transducer heat through dual-face conduction and convection, enabling sustained high acoustic intensities.

An acoustic fireplace coupled to waveguide ducts attenuates low-frequency noise by absorbing energy internally and radiating it outside.

A signal processor calculates coherence between input and reference audio signals to adjust stored background noise estimates.

A method generates initial reflected and reverberant sound control signals based on virtual space geometry to synchronize audio output.

Adaptive filter circuitry correlates multiple microphone signals to identify spurious readings in vehicle cabins.

Foaming mixture with non-foaming powder creates sound-absorbing member, resolving low strength and poor ventilation of existing granules.

Segmentation and nesting principles enable a mute to disassemble for compact storage inside the bell while maintaining acoustic performance.

Microphones detect horn noise and amplifiers invert phase to create destructive interference, reducing cabin noise without blocking crew communication.

A sound reducing mask uses a unidirectional flap valve to control airflow while muffling noise.

Directional detection isolates drive unit noise to prevent artifacts from irrelevant sounds, improving vehicle acoustic comfort.

Flexible PCB tabs connect sonar transducers without soldering, eliminating elastic response interference that degrades image quality.

A noise reduction apparatus adjusts multiple control sound sources to match the directivity of unknown rotating noise sources.

Perpendicular baffle fins absorb vibrational energy to protect sensitive components from cooling-induced acoustic noise.

A noise cancellation system estimates error signals at remote locations using predictive filters to adjust destructive interference.

Varying the cross-sectional area at node positions suppresses standing waves without adding sound absorbers, lowering production costs.

Embedded resonators in porous matrices achieve absorption coefficients above 0.8 at low frequencies without increasing panel weight.

Segmenting feedforward and feedback paths reduces computational load and power consumption while maintaining high noise cancellation performance.

A masker sound generation device synthesizes signals to create an optimal equivalent noise level.

A one-component epoxy-anhydride composition provides acoustic damping through viscous energy conversion.

An adaptive feedback cancellation system freezes filter coefficients during quiet periods to maintain stable gain.

Magnetic coupling transfers acoustic energy between resonators across barriers, enabling sound transmission through vacuums and rigid materials.

A metamaterial cell uses Fabry-Pérot and Helmholtz cavities to reflect sound waves.

A composite ultrasonic transducer case combines metal and plastic components to reduce mechanical quality factor while maintaining sound pressure level.

A slotted pipe device with resistive material directs high-frequency sound laterally, resolving insufficient lateral radiation in conventional TV audio systems.

A vehicle noise cancellation system configures a digital filter using real-time operational data to generate precise anti-phase acoustic waves.

A circumferential loudspeaker array generates control signals to reduce rotating blade noise in flight vehicles.

Adaptive secondary path filters update sequentially to maintain effective noise reduction when speaker-to-microphone transfer characteristics change.

Isochronous cycle timer shrinks serial bus frames under 125 microseconds to meet active noise cancellation latency requirements.

A noise-canceling system selects filter coefficients based on phase differences between multiple microphone signals.

A writing input device uses a pressure detector and sound producer to generate pseudo sounds based on nib contact force.

A convex curved surface member redirects ultrasonic energy to eliminate standing waves and resolve uneven cleaning caused by flat reflectors.

An ultrasonic sensor bezel integrates an elastic O-ring to attenuate mechanical vibration transmission from the vibrator.

Plasma surface activation prevents conductive material peeling during sputtering, securing reliable bonds for mass production of electret diaphragms.

Chamfered notch guides sensor insertion, preventing seal degradation and ensuring reliable positioning in automotive applications.

Segmented cross tube and Z tube assemblies enable precise alignment while simplifying installation on vessels.

A sonar beam footprint overlay projects transducer coverage onto nautical charts for precise object tracking.

Segmented honeycomb core absorbs acoustic energy through apertures, resolving noise reduction and recyclability trade-offs.

Vulcanized silicone rubber composite lens structure for ultrasonic probes.

Helmholtz resonator arrays enable extraordinary acoustic transmission, resolving reflection losses while maintaining sub-wavelength thickness.

Combines imaging and audio functions in one housing while acoustic isolation features dissipate vibrations and standing waves to prevent interference.