Hearing Device Active Noise Cancellation TRIZ Cases

Segmenting the earbud into replaceable modules reduces material waste and lowers replacement costs while maintaining high-quality sound.

A hybrid active noise control system uses a duct to delay external noise reaching the feedback microphone for synchronized anti-noise generation.

Dual microphones measure sound levels inside and outside the ear canal to calculate seal differences, eliminating extra hardware for accurate assessment.

Earphones adjust noise reduction parameters to match user hearing thresholds, preventing negative pressure in quiet environments.

Coordinates left and right earphone noise cancellation amounts via threshold-based parameter adjustment to resolve performance disparity.

Wearable headphones analyze ambient noise frequency components to switch filter characteristics automatically.

Accelerometers in headphones detect skull vibrations during speech to enable secure biometric authentication while reducing external noise interference.

A feedback active noise reduction headphone positions the microphone away from the loudspeaker to enhance sound attenuation.

Segmented acoustic chambers and impedance elements relieve air pressure while maintaining low-frequency output.

An adaptive noise canceling circuit uses oversight control to manage anti-noise signal generation in personal audio devices.

A cochlear implant sound processor generates spectral output signals by excluding input components below a system noise threshold.

A control system detects bias voltage presence during startup to enable automatic power down for aviation headsets.

Adaptive beamformer applies diagonal loading to correlation matrices, achieving 15-30 dB noise reduction while minimizing algorithmic delay.

Synchronizes automatic gain control updates between bilateral hearing prostheses to preserve binaural cues.

A networked terminal detects and filters subjective audio nuisances by sharing noise data across connected devices to improve local filtering accuracy.

A control leak and feedback ANC system reduce sound pressure in the ear canal, alleviating the occlusion effect by up to 25 dB.

Real-time coefficient adjustment eliminates costly production calibration while delivering personalized acoustic performance.

Feedback system detects instability by processing signals to adjust gain and phase characteristics, preventing oscillations caused by acoustic path variations.

A hearing aid system estimates inter-microphone phase difference to apply frequency-dependent gain for noise suppression.

A howling suppression method for active noise reduction earphones uses dual microphone signals to detect pre-howling states.

A dual-channel noise power spectral density estimator uses a secondary microphone to improve speech quality in communication devices.

A noise suppression processing system detects headset capabilities by comparing signal-to-noise ratios of audio streams.

Wearable audio devices detect environmental audio events to switch passthrough amplification modes.

A hearing prosthesis fitting method estimates user-specific signal-to-noise ratio loss to set noise reduction parameters.

A hearing aid directional system separates target signals from noise using a blocking matrix and adaptive filtering.

A feed-forward adaptive noise-canceling system uses a classifier to select filter coefficients from a look-up table based on acoustic environment measurements.

A headphone signal processing apparatus uses an internal microphone to capture output sound and compares it against target characteristics to select personalized filter parameters.

An accelerometer detects wear noise to inhibit audio signature generation and transmission.

A noise cancellation filter structure combines minimum and maximum phase filters to independently control amplitude and phase responses.

A sensor housing positions emitters and detectors on differently oriented surfaces to control radiation paths within the ear canal.

Classifying algorithm selects pre-determined acoustic filters from memory to optimize active noise control performance in hearing devices.

Plasma-treated ingress membrane enhances adhesion to microactuator reeds in contact hearing devices.

Current sensing detects ear canal pressure changes from user taps, resolving false noise triggers in ANR headphones.

Auto-calibrating feedback noise cancellation systems apply microphone signal gain correction factors derived from measured plant and coupler responses.

Deconvolution filters decompose transfer functions to reduce total delay and interference between direct and amplified sound signals.

An acoustic delay line shifts ambient sound timing, enabling destructive interference with anti-sound waves to cancel noise without occlusion discomfort.

Separating noise cancellation and audio playback into distinct speakers prevents inter-modulation distortion while maintaining high fidelity.

A wearable audio device compares external and internal audio signals to generate user notifications when similarity is detected.

A detection microphone and speaker feature input and output vibrating plates oriented in the same direction to minimize phase lag.

All-pass filter frequency warping stabilizes hearing aids by breaking Nyquist criteria to reduce acoustic howling artifacts.

A depletion-mode switch routes audio signals around noise-canceling circuitry based on battery voltage thresholds.

First earphone detects nearby target devices and establishes a voice link to transmit processed audio signals.

EEG-based audio processing detects user distraction through brain activity monitoring, dynamically adjusting signal parameters to reduce auditory interference.

A hearing device system combines processed audio signals with active noise cancellation outputs to drive an output transducer.

Audio transducers detect body noise to calibrate playback symmetry, resolving wear asymmetry artifacts without extra hardware.

Open headphones use microphones and processors to generate anti-noise, reducing ambient noise interference while maintaining situational awareness.