Signal Processing TRIZ Cases

Detects replay attacks by identifying frequency-based variations in signal content indicative of loudspeaker use.

A mobile terminal adjusts wireless headset playback volume within a target range derived from external noise levels.

Multiple woofers output low frequency sound to yield a homogeneous field across vehicle seats.

A foldable electronic device routes audio data to the correct housing speaker using sensor-detected folding state information.

A microphone array system determines propagation vectors and beam former outputs to generate a decoupling matrix for audio data separation.

A telepresence controller detects spatial relationships between cameras and displays using microphone arrays to automatically configure video feeds.

A hearing system adjusts compression and noise suppression based on detected interlocutor count.

A mechanically actuated panel acoustic system uses segmented sub-panels driven by digital signal processors to produce coherent audio outputs.

Resolves voice communication strain during social distancing by using intermediary audio devices and preliminary detection to maintain personal distance.

Dynamic volume control resolves the contradiction between clear communication and privacy protection by adapting to environmental conditions.

Offset sound outlets in the rear bandpass housing cancel rear radiation across wide frequencies, solving low-frequency directivity limits.

Frequency-domain estimation signals undergo feature decomposition to generate separation matrices for extracting distinct audio sources.

A directionality control system uses microphone arrays to capture audio signals within defined image areas.

A transformer magnetically couples stereo loudspeaker channels, eliminating capacitor resonance and distortion in bridge amplifiers.

Spatial source separation removes signal contamination from noise covariance estimates, preventing beamformer cancellation errors during continuous operation.

Selective warning sound detection preserves situational awareness in noisy environments while maintaining effective acoustic protection.

A sound quality device monitors audio signal voltage and current to estimate impedance and calculate real-time sound pressure levels.

A wearable device computes exertion levels from biometric and activity data to generate personalized exercise recommendations.

A computer-implemented method adjusts audio signals using separate parameters with two operation modes.

A loudspeaker system processes audio signals using bass substitution to reduce low-frequency sound leakage into adjacent zones.

A media playback system uses physical tokens with embedded tags to trigger spatial audio generation for visual content.

A mobile device design shares the receiver acoustic opening with a microphone to enable beamforming audio capture.

An audio device processor applies primary and secondary gains to microphone signals using beamforming.

Dual signal processing channels in a hearing aid combine noise reduction and level limiting to preserve quiet noises without threshold switching artifacts.

Amplitude-modulated speech-like stimuli enable objective auditory steady-state response recording.

Virtual matrix segmentation isolates audio feedback paths for targeted signal attenuation while preserving sound quality in unaffected output zones.

A processor orients a microphone array toward a user location detected by an electromagnetic presence sensor.

An audio control system detects non-functioning channels and merges their signals to preserve acoustical enjoyment during single-channel playback.

Smart speakers detect sound transfer between rooms and adjust volume or equalization to reduce noise disturbance in adjacent spaces.

An adaptive receiver uses acoustic feedback to compensate for varying impedance, ensuring consistent sound quality across different usage scenarios.

A hearing aid system splits input signals into frequency bands to determine signal variability and applies targeted gains for enhanced sound processing.

Omnidirectional microphones form directional signals by separating frequency ranges and applying targeted attenuation to upper bands.

A hearing device adjusts tinnitus masking signals using level tracking and classification units.

A system processes audio signals to separate and amplify medium frequency components for directional output.

A hybrid hearing device merges ear canal pinna cues with external beamforming signals for spatial audio processing.

Encoding control information as frequency-modulated audio signals resolves reliability issues caused by lossy compression in standard Bluetooth transmission.

Online anti-feedback system for hearing aids estimates acoustic feedback paths using adaptive filters to adjust forward gain values dynamically.

Computing system generates correction filters using tone burst signals to equalize audio output.

Multiple microphone sets detect audio signals from different angles to isolate user utterances.

Dynamic audio routing switches between mono and stereo modes using orientation sensors, resolving the trade-off between processing simplicity and sound quality.

Segmentation distributes control to a companion device, resolving size-versus-functionality trade-offs in compact audio hardware.

Estimating individualized head-related transfer functions using in-ear microphones and orientation data to resolve sound localization errors.

A dual loudspeaker sound generating device uses phase opposition between front and rear cavities to improve near-field sensitivity.

A device detects environmental noise levels to dynamically switch between audio playback and text display modes.

A beamformer computes updated filter coefficients to adjust acoustic echo canceller parameters using a relative transfer function.

Segmented beamforming maintains signal-to-noise ratio despite direction-of-arrival estimation errors.

Electronic devices calculate modified acoustic radiation patterns using sensor data to optimize sound output.