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.