Sound Producing Devices TRIZ Cases

Pivotable retaining elements on a cylindrical sensor housing enable simple external mounting while preventing damage during insertion.

A towed sonar array control system modifies drive signals using amplitude and phase adjustments based on a virtual source distance to defocus the beampattern.

Accelerometers replace microphones to detect engine harmonics, while adaptive lookup tables adjust cancellation signals for rapid changes.

Counter-phase damping pulses shorten the transducer reverberation period, enabling obstacle detection within 5 to 7 centimeters.

Thermo-acoustic Rijke tube generates anti-noise to cancel helicopter rotor blade frequencies.

A feedforward active noise controller limits signal amplitude to stabilize the cancellation process.

Dynamic adjustment of virtual walls resolves the trade-off between spatial sound precision and computing power requirements in electro-acoustic systems.

Acoustic horn uses selective resistive wall elements to dampen resonances and manage impedance mismatch for consistent sound pressure.

Focused acoustic waves generate radiation force at an interface to produce mechanical displacement in viscoelastic media.

Acoustic baffles mount to thin submarine hulls alongside sonar receivers.

A phase rotation processor focuses N-bit digital RF signals through additions or subtractions to generate quantized values.

A coupling device transforms ultrasonic signals into pulses to extract directional information from phase data.

A road noise cancellation system detects object strikes via accelerometer signal analysis to mute speakers and prevent anti-noise radiation.

A hearing instrument plug-in connection uses a moveable catch to secure tubes and lines within the housing.

An active noise reduction device uses a test signal to detect reference sensor attachment anomalies through acoustic monitoring.

A rolling element bell with a curved recess guides a ball to strike the shell, resolving fixed swing cycles by enabling adjustable pitch and intensity.

Energy-based control minimizes radiated sound power, preventing local noise amplification and reducing system complexity.

Bambusoideae bamboo powder improves acoustic damper damping while reducing thermal conductivity and weight.

Coupled resonators on metasurface beam strips absorb flexural waves without reducing bending stiffness or adding mass.

A composite acoustic reflector uses a microcellular rubber core to direct sound waves via impedance mismatch.

High softening point tackifiers shift the Tan Delta Peak Temperature in styrenic block copolymers to enhance damping capacity.

Segmented auxiliary filters switch based on head movement, reducing device complexity while maintaining cancellation.

Mounting rings enable rotational alignment of ultrasonic transducers across barriers using temporary assemblies and suction cup fittings.

Segmented parallel processing reduces memory overhead and power consumption for high-volume ordered data streams.

Segmenting the transducer from a flexible waveguide bypasses bone absorption, enabling precise delivery in confined anatomical spaces.

Optimized fiber composition reduces breakage and clumping during carding, enhancing sound absorption in low and high frequency regions.

A vehicle noise control system uses a Youla parameter with frequency-dependent coefficients to attenuate narrowband sound.

A treadmill noise control system generates anti-phase waveforms to cancel motor sound.

Parallel filter circuits process independent signal paths to resolve the trade-off between convergence speed and noise cancellation effectiveness.