Sound Producing Devices TRIZ Cases

Finite impulse response filters and delay elements cancel direct sound interference, enabling a wide sweet spot without additional rear speakers.

A sound effect apparatus localizes pseudo reflections using position data to create dynamic audio fields.

Automated tuning rules adjust forgetting factors in engine-order-cancellation apparatuses, eliminating manual calibration and improving operational stability.

A sonar mapping system creates real-time topographical charts of lakebeds using a transducer assembly and processor.

Audio processing module adapts headrest loudspeaker output using real-time ear position data from image acquisition.

Alkaline treatment charges non-asbestos fibers, enabling surfactant foaming to resolve poor dispersibility and low resilience.

A method adjusts audio gain and noise cancellation gain independently using distinct user inputs to manage signal processing.

A bilayer acoustic metamaterial cell couples resonator layers to absorb sound across a wide frequency band.

Dynamic coefficient adjustment resolves adaptability complexity trade-offs by isolating speech from noise under varying microphone conditions.

Smartphone sensors capture driver parameters to calculate targeted anti-noise for motorcycle headsets.

A piezoelectric sounding body uses a caulking mechanism to fix the upper case to the lower case.

Separate sound propagation guides cancel specific noise frequencies by satisfying length difference constraints, eliminating expensive resonators.

A multi-transducer ultrasonic sensor system determines object positions using combined time-of-flight and phase difference measurements.

A 2-part reactive urethane resin composition forms open-cell soft polyurethane foam with high sound absorption.

An acoustic metamaterial layer with negative refractive index parameters matches the complex impedance of porous media, reducing reflection at low frequencies.

A vehicle sound control system corrects speaker signals based on ear distance to simplify active noise cancellation.

Adaptive noise-canceling circuit uses ambient noise as a training signal to update secondary path estimates, resolving inaccuracy when source audio is absent.

Real-time telemetry updates counterwave generation to reduce urban air mobility noise while adapting to dynamic vehicle movement.

A listening apparatus switches between noise suppression and sound amplification based on environmental levels.

A noise control system generates anti-noise signals to cancel specific unwanted sounds while preserving important operational audio.

A logic device detects ambient noise conditions via power estimation to tune an adaptive filter, reducing residual noise and audible artefacts.

A variable bandwidth delayless subband algorithm decomposes broadband signals into non-uniform subbands using a discrete Fourier transform filter bank.

A multimodal epoxy damping mass stabilizes ultrasonic attenuation across extreme automotive temperature ranges.

An engine order cancellation system adjusts forgetting factor and step size parameters to suppress acoustic interference signals.

A ventilation wall uses a mass-spring vibration system to attenuate sound waves across multiple frequencies.

An adaptive digital filter adjusts headphone acoustic noise cancellation parameters in real time.

Segmenting transducer elements into sub-apertures reduces cable complexity and silicon area while maintaining imaging resolution.

Acoustic Luneburg meta lens achieves omnidirectional wave focusing by varying unit structure volume from center to edge.

A control circuit adjusts dynamic range enhancer gain characteristics based on detected noise canceling component amplitude.

Curved acoustic lens redirects sound waves through smooth surface transitions, reducing edge interference for uniform radiation.

Inverting pixel orientation reduces noise patterns while maintaining computational efficiency.

Cancellation filters redirect acoustic energy from adjacent speakers to eliminate cross-seating leakage and improve listening clarity.

A displacement amplification mechanism in an electromagnetic actuator expands movement using elastic magnetic components.

Centralized comfort noise generation merges spectral estimates from all devices to eliminate background noise fluctuations in mixed audio signals.

An elastic suspension supports a porous acoustic panel to form an air gap, absorbing low frequency noise that standard panels miss.

Segmenting measurement into reusable head-related components eliminates studio visits while maintaining acoustic accuracy.

Air passages transmit sound through openings while an airtight shield blocks smoke and moisture from the outputter.

Semi-wave transducers with undulating platens maintain stability under hydrostatic pressure while enhancing transmitting voltage response.

Frequency domain decomposition enables parallel adaptive filter processing, reducing hardware computation time while maintaining high noise reduction quality.

Position sensors guide beamformers to isolate individual voices from simultaneous speakers, resolving signal distinction difficulties.

A vehicle active noise control apparatus generates a virtual reference signal from multiple acceleration sensors to improve cancellation accuracy.

Reed-based acoustic absorber panels resolve weight and absorption trade-offs by combining bulk materials with honeycomb structures.

Flexible acoustic barrier with magnetic elements wraps around piles to dampen impact and ringing sounds during driving operations.

Short-wavelength radiofrequency beams interrogate acoustic reporters to determine sound source positions, resolving high-frequency measurement precision limits.

A noise cancellation system generates anti-phase sound waves to neutralize siren acoustics inside emergency vehicles.

A feedforward noise cancellation apparatus generates targeted acoustic signals based on sensor data to suppress internal vehicle component sounds.

Parallel processing chains identify noise types to attenuate undesirable sounds while amplifying useful audio signals.

Heterogeneous elastic composites resolve low stiffness bottlenecks by adjusting density and wave speeds for effective energy transfer.

A sound masking signal follows input speech frequency spectrum to obscure conversation without disrupting audio experience.

A filter coefficient updater uses a stored adaptive filter coefficient as an initial value to generate cancelling sounds in vehicles.