Signal Processing TRIZ Cases

Pre-calculated loudness metadata lets audio receivers equalize MPEG, AC-3, and HE-AAC playback levels and avoid repeated volume changes.

Cross-band threshold adjustment spreads gain reduction across frequency bands to limit playback distortion without altering natural timbre.

An asymmetric polynomial distortion generates bass harmonics that small speakers can reproduce while limiting aliasing, clicks, and overload.

A built-in microphone detects reflected sound to auto-adjust playback equalization as room acoustics or speaker position change.

Independent amplifier channels isolate speaker faults and adjust output power to keep evacuation messages intelligible during emergencies.

Coordinated limiter adjustment across playback devices balances volume by frequency range and prevents distortion when one speaker reaches its acoustic limit.

A balancing limiter shifts crossover frequency between playback devices to prevent volume mismatch and preserve synchronized audio quality.

Selective frequency-band shaping reduces spectral overlap so mixed audio signals stay audible while preserving the original acoustic level.

Audio features drive adaptive multi-band gain updates to limit clipping and distortion in hearing prosthesis sound processing.

Weighted frame-based loudness control smooths volume shifts in real time while avoiding AGC pumping, breathing, and loss of transparency.

Gain correction in the receiver aligns perceived loudness across MPEG, AC-3, and HE-AAC audio, reducing volume changes between channels.

Dual-time averaging and threshold-based gain correction keep volume stable across audio sources while reducing saturation and listener discomfort.

An anti-parallel diode feedback path keeps input impedance high for weak sensor signals while limiting distortion and muting at loud amplitudes.

Stored and restored zone-player volumes keep grouped and ungrouped playback transitions smooth and volume levels consistent.

A headphone control module combines device ID and button-entered personal codes to unlock functions securely without repeated manual unlocking.

A built-in microphone captures reflected test audio to detect room acoustics and automatically adjust playback equalization without manual tuning.

Soft limiting and smoothing of FFT bin magnitudes raise perceived audio level while reducing hard-clipping noise and distortion.

External sound matching lets noise-canceling audio lower playback or issue prompts when important nearby sounds are detected.

A smartphone app uses its built-in microphone to measure stereo output and auto-adjust 20 Hz-20 KHz response without extra hardware.

A rectifier and feedback-controlled JFET limiter smooths headphone volume peaks while reducing harsh diode distortion and hearing risk.

Shared weighting factors across hearing-aid subchannels cut adaptive filter calculations, lowering power use without hurting noise suppression.

Frequency-domain analysis detects overloaded speaker bands and lowers only high-energy frequencies to prevent distortion in combined vehicle audio.

Gain changes are timed to psychoacoustic event boundaries using specific loudness, reducing audible artifacts in dynamic audio processing.

Disabling AGC during speech recognition and blocking gain switching during input helps reduce recognition errors and keep audio capture stable.

Cross-channel weight transfer in a multistage hearing filter bank cuts adaptive filtering steps while preserving noise suppression and audio quality.

Dynamic cross-band threshold adjustment shares gain reduction between frequency bands to cut playback distortion while preserving natural timbre.

By splitting audio into narrow bands matched to each transducer’s resonance, the array cuts distortion and raises output from the same power.

Switching between high- and low-gain digital audio paths at zero-crossings preserves wide dynamic range while limiting distortion and noise.

Switching headphone controls into purchase mode lets users adjust price and confirm mobile purchases without retrieving the phone.

Dynamic headphone gain control uses ambient noise and earphone attenuation to keep listening levels near surrounding sound and reduce hearing risk.

Dynamic crossover adjustment tracks volume changes so each speaker handles its optimal frequency range with less distortion.

Interconnected hearing units share multiple audio inputs so users can boost speech and suppress background noise in restaurants, cars, and calls.

Logic-controlled transformer taps match speaker impedance to amplifier load, enabling individual volume control and power reallocation.

Specific-loudness event detection keeps gain constant within auditory events and shifts changes to boundaries to reduce audible artifacts.

Cumulative listening exposure is tracked by frequency range so a media player can adjust playback and limit hearing damage risk.

By limiting the L-R signal against L+R and detecting program changes, this case keeps stereo TV volume more consistent and reduces listener discomfort.

A microphone-speaker earplug smooths frequency response, limits leakage, and mutes abnormal sounds while preserving listening quality.

Controls L-R versus L+R stereo signals to keep perceived loudness stable during program changes and excessive spatial processing.

Dynamic band mapping shifts limited processing channels to critical frequencies, balancing power use and resolution for hearing-focused audio.

An error microphone tracks ear pressure and transducer coupling so ANC can adjust anti-noise and avoid disruptive cancellation.

Calibrated earphone sensitivity and time-weighted SPL tracking help limit unsafe listening exposure while mixing ambient sound awareness.

Time-delay alignment, mid-side decomposition, and HRTF filtering turn simple microphone captures into binaural audio with preserved spatial cues.

Complex-valued sub-band filters improve audio time-frequency resolution while cutting latency, computation, and musical noise artifacts.

Interaural time and level differences guide a binaural beamformer that improves directional audio and rejects noise across low and high frequencies.

SNR-based frequency-band enhancement boosts speech intelligibility and articulation in noise without causing muffled or shrill sound.

Real-time listener tracking adjusts each speaker's volume by distance to keep surround sound balanced and comfortable as players move.

Frequency suppression, gain adjustment, and partial harmonic distortion raise perceived loudness from small speakers without added bulk.

Audience-position beamforming redirects speaker array output toward side listeners while suppressing side-lobe noise through weighting vectors.

Pair-wise spectral coherence and balance gains reduce noise and echo while preserving stereo spatial cues and high-frequency fidelity.

A master volume interface preserves speaker balance while allowing individual and collective audio level control across a home network.