Sound Producing Devices TRIZ Cases

An annular acoustic transformer uses radial divisions to maintain equal path lengths and expansion rates across segmented input sections.

Tuned acoustic resonator cavity attenuates fan blade passage noise, reducing aeroacoustic disturbances that cause hard disk drive throughput failures.

Segmenting rigid panels into pliable coupled resonators maintains uniform air layer distance for consistent sound absorption on curved walls.

A noise cancellation system adjusts configuration parameters based on real-time vehicle operating conditions.

Feedback active noise control system separates wanted and unwanted signals using dual subtractors, resolving long secondary path delays.

An active system cancels low-frequency vibrations that passive resonators cannot dampen, reducing cab noise levels.

A controller switches a PathPR filter to an identity matrix during fast-adapting events.

Electronic personal displays generate noise-cancelling sound waves using speakers and microphones to create a distraction-free reading environment.

A funnel horn with a flat side surface aligns the sound generator to direct emission parallel to the boundary.

Nesting hydrophones inside emission rings reduces sonar antenna volume, eliminating bulky articulated arms.

A feedback active noise control system separates residual noise components to update the controller and model the secondary path independently.

A modular inspection system integrates 3D sonar and inertial navigation to generate detailed underwater structure models.

A sampled analog beamformer applies fractional delay filtering to ultrasound transducer signals before high voltage amplification.

Predicting tire noise via digital maps allows the control unit to switch between active and energy-saving modes, reducing electric vehicle power consumption.

A reverberation system converts signals to the frequency domain and performs convolution operations.

Origami folding replaces computational phase delays, reducing device complexity while maintaining directional sensitivity.

Applies frequency-dependent gain via active noise control and hearing assistance modules to compensate for mild to moderate hearing loss.

A sonar transducer housing integrates hull, transom, and trolling motor mounting features into a single assembly.

A cascade filter configuration replaces conventional channel response finite impulse response filters in active noise cancellation systems.

Adaptive filter controller adjusts coefficients based on acceleration sensor data to suppress midrange unwanted sound during noise level transitions.

A sheltering structure uses embedded acoustic sensors and transducers to generate anti-noise signals that cancel external disturbances.

An adaptive noise canceling circuit monitors anti-noise signal levels to protect the audio transducer from damage.

A controller corrects error signals using a correction filter to match user acoustic characteristics.

A sonar system calculates horizontal distances to targets using fan beams with distinct elevation angles and pre-computed propagation paths.

System extracts vibration features from event signals via Fourier transforms, reducing data volume while maintaining detection accuracy.

An asymmetric sonar antenna reduces surface reverberation noise by attenuating sound energy faster in opposite directions.

A retractable radar mounting system uses accordion-style fold lines to absorb impact energy and protect vehicle sensors.

Replacing FIR filters with adaptive notch algorithms reduces computational load while maintaining effective cancellation of engine rotational noise.

Integrating transducers on a reverberant solid object eliminates manual adjustments and reduces positioning errors during imaging.

Color mapping displays water depth contours in 3D sonar images, eliminating the need for image rotation to identify target depths.

Segmented metamaterial members with nested inner masses absorb vibro-acoustic loads across wide frequency ranges.

Acoustic partial enclosure combines absorber-barrier materials with adaptive frequency matched sound masking to reduce unwanted noise.

A vehicle noise cancelling system adjusts operation modes based on real-time cabin state inputs to maintain acoustic comfort.

A plate-shaped aluminum mediator accommodates mismatched thermal expansion coefficients between a ceramic stiffener and a polypropylene bumper.

A noise control device limits phase differences between speaker outputs to maintain uniform cancellation zones.

Integrated tooling merges expandable and carrier molding to lower costs while boosting acoustic sealing.

Predictive braking parameters trigger destructive interference signals that cancel motor and pump vibrations during adaptive cruise control deceleration.

A bituminous damping layer bonded to a polyethylene foam panel eliminates acoustic distortions caused by vehicle vibrations.

An integrated optical shield blocks crosstalk within a tapered ultrasonic waveguide, resolving divergence and reflectivity issues in range sensing.

Coordinate transformation models cloak acoustic waves with generalized time dependency, resolving frequency limitations.

A damping element with annular grooves and a mass segment decouples axial and rotational vibration modes in an ultrasonic transducer.

Segmenting the lens into unit cells with varied scatterer sizes resolves the trade-off between precise phase accumulation and structural complexity.

Alternating panels and porous absorbers resolve the trade-off between construction simplicity and sound attenuation capability.

Downsampled reference data routes through an ANR circuit interface to a processing device for adaptive noise reduction analysis.

Axial cooling elements on the coil carrier back surface conduct heat away from the coil, reducing thermal stress and extending component lifetime.

A wearable audio device uses a processor to select filter coefficients from a table based on sensor signals and user input.

Removable composite acoustic panel absorbs acoustical energy to reduce unwanted reflections and enhance recording quality in non-treated rooms.

Unified control logic automatically switches display and audio output modes based on ambient state analysis, eliminating manual synchronization labor.