Sound Producing Devices TRIZ Cases

Frequency-subband virtual microphone processing improves vehicle ANC broadband and high-frequency noise reduction while lowering computational demand.

Embedded quarter-wavelength resonators around a panel duct absorb airflow noise across a wider frequency range while simplifying support.

Ambient noise frequency analysis enables automatic masking sound selection, reducing manual tuning while maintaining strong masking effects.

Separate channels capture voice and background music independently, avoiding environmental noise and poor speaker playback in livestream audio.

Hinged tabs cut into semi-rigid fibrous parts align with mating cavities to simplify composite assembly and reduce tolerance stack-up.

Repeated resonant channels in angle-independent acoustic scatterers broaden sound absorption and maintain transmission loss across incident angles.

Generates participant-specific pseudo crowd sounds to preserve live ambiance while avoiding high-bitrate audio transmission issues.

A primary path filter enables accurate secondary-path adaptation without audible white noise, improving convergence and cabin sound stability.

A freely moving membrane in a perforated acoustic filter blocks high-intensity waves while preserving low-level sound transmission.

Models a virtual object as symmetry-grouped points to generate real-time reverberation with fewer delay lines and lower compute cost.

Microphone-detected fan noise is converted into a reference signal that drives speaker anti-noise, preserving audio fidelity in wearable headsets.

By converting sound pressure transfer data into time-based acoustic energy, this case improves sound field correction for reverberation and absorption.

Built-in VR microphones and speakers are coordinated to remove howling and reduce monitoring delay while matching audio to virtual scenes.

Dual sensor signals update ANC filter parameters in real time, improving vehicle noise reduction stability and response at the ear.

Integrated partition tubes split each honeycomb cell into dual resonators, widening sound absorption while cutting mass and assembly complexity.

Opposite-phase speaker pairs create a small private listening zone near a seat, reducing sound leakage without earphones.

Opposite-phase speaker pairs create a private listening zone without earphones while suppressing sound leakage to nearby users.

Electronic acoustic modification changes cabin reverberation to create different listening environments without adding structural acoustic treatments.

A single-link audio hub consolidates wired and wireless peripherals to cut latency, improve audio quality, and enable real-time dosimetry.

Time-modulated transducer arrays separate simultaneous acoustic beams by carrier frequency to limit interbeam clutter, Doppler ambiguity, and spectra leakage.

Selecting the strongest return within each rotation angle keeps underwater echo images accurate even when synchronized transducers rotate faster.

A tuned cavity and opening layout boosts alarm-tone sound pressure by 6-10 dB across key frequencies without added electronic amplification.

Integrated heaters tune Helmholtz resonator cells to track changing noise while preserving heat dissipation in server environments.

Acoustic sensing replaces corrosion-prone conductive contacts, triggering wind chime lights nearly simultaneously with each ringing event.

Quarter-wavelength metasurfaces use meandering resonators to suppress narrowband server noise while limiting heat buildup near the server.

Frequency-domain limiting adjusts leakage gains by band to suppress noise boosting and keep vehicle ANC stable under abnormal inputs.

Shared tuning of Helmholtz resonator cavities targets changing noise frequencies while keeping heat levels low in server environments.

Convolution-based training lets a learning model remove or add reverberation while preserving sound quality, even from smartphone recordings.

Controlled heating melts a thermoplastic film so a honeycomb core bonds to fiber-reinforced skins with stronger joints and better sound attenuation.

MEMS-actuated Helmholtz resonators retune cavity resonance to absorb changing server noise while preserving thermal performance.

A folded metaporous coating extends the sound path in thin nacelle space, improving low-frequency absorption without added volume.

A diaphragm and electromagnetic transducer let an ultrasonic sensor mount flush on a vehicle bumper without protrusion or attachment holes.

Shared Kalman gain estimation across microphone channels suppresses acoustic howling while preserving target audio quality and lowering processing load.

Separating recording distance from listener distance avoids overlapping air absorption and preserves tone accuracy in immersive audio playback.

Out-of-phase dipole speakers cancel bass soundwaves to limit sound travel, reduce rattling, and contain audio within the listening area.

Distributed sensors and actuators in an open duct adapt to fluid changes, extending active noise cancellation across a wider frequency range.

Signal-corrected virtual sound pressure estimation expands vehicle noise cancellation range without adding microphones or hardware complexity.

Targeted noise reduction at speaker-specific frequencies improves speech comprehension in noisy rooms while preserving the overall acoustic atmosphere.

A motor-driven telescopic arm moves a mallet along the bowl rim for hands-free playing across different singing bowl sizes.

By comparing combined playback and microphone feedback signals, this case detects loop instability early and supports wider-band ANR.

Manifold learning maps partial microphone observations onto tangent spaces to estimate room sound fields faster with lower computation.

Uses AR device data and situation-based correction to estimate room acoustic features accurately without dedicated measurement equipment.

Adjustable bypass groove lengths shift sound-wave phase to attenuate multiple frequency bands in a compact sound insulator.

Precomputed compensation parameters tied to engine speed help active noise cancellation respond faster to rapid engine noise changes.

Adaptive control retunes canceling sound to the detected peak noise frequency, reducing residual noise as input conditions change.

Ear-level acoustic modeling helps vehicle RNC adapt cabin, transducer, and CAN inputs to cancel road noise where passengers actually hear it.