Signal Processing TRIZ Cases

Local mixing in daisy-chained control devices reduces latency while allowing independent volume adjustment for each user.

A guarded sound pickup device uses a movable acoustic barrier to physically block or allow sound entry.

Mobile apps allow patients to adjust hearing aid settings directly, eliminating facility visits for audiogram updates.

A vehicle speaker control unit measures inductance to determine temperature and adjusts current for consistent sound output.

A hearing system uses dual microphones to compare acoustic spectra and generate a proximity indicator for automatic signal processing selection.

A controller evaluates recorded sound images from a source zone to select and adjust loudspeakers in adjacent zones for optimized audio distribution.

A noise estimation system adjusts levels using distinct time constants for rising and falling signals to accelerate adaptation speed.

A sleep management system monitors physiological data and environmental conditions to generate personalized feedback for users.

Audio encoding device estimates angles of incidence to derive A-format direct sound signals from a minimal microphone array.

A handheld fitting system delivers calibrated test audio signals to a hearing device's non-acoustic input for user adjustment.

Dynamic microphone muting prevents echo and feedback loops by ensuring only one device transmits at a time.

A computing device uses a multi-plane microphone array to detect audio data and calculate user location.

Audio amplification device manages ambient and secondary sound signals through separate electrical channels.

A branching unit separates microphone input into distinct streams for caller transmission and synthesis.

A digital processor adjusts transparency gain to enhance ambient sound clarity.

A microphone array structure uses phase difference estimation to select noise reduction algorithms based on signal angles.

Embedded watermarks in audio signals enable accurate direction of arrival estimation without audible calibration tones or special setup procedures.

Dynamic sensitivity adjustment resolves the trade-off between voice recognition accuracy and power consumption by adapting to wearing states.

Information processing device adjusts virtual sound sources via wave field synthesis to deliver spatial audio.

A lubricator apparatus uses a detector to generate signals representing applicator rotation, enabling precise control of the dispenser.

An ultra-wideband system measures time-of-flight to determine user location, enabling automatic sound level adjustments that eliminate manual volume control.

A multi-band dynamics processor splits audio signals into frequency bands to apply independent gain adjustments.

A method calculates compensation gains and filtering coefficients based on minimum audible amplitudes to adjust acoustic frequency response.

Control signal circuitry scales gain to preserve signal linearity despite nonlinear processing stages.

A sound signal processing device segments audio into direct, early reflection, and reverberant components to control acoustic output.

Iterative Wiener filter updates separate multi-channel audio sources using cross-covariance and power matrices to resolve real-time processing delays.

Segmenting acoustic frequency ranges enables targeted phase shifts that minimize disruptive artefacts in hearing aid devices.

Structured Sparse Bayesian Learning stabilizes dynamic relative transfer function estimation against head movements and environmental noise.

Control device maps volume parameters to sound pressure levels via lookup tables, resolving multi-channel surround system calibration inconsistencies.

Dynamic fan control reduces audio interference by limiting operation time during low-volume segments while preventing overheating.

Processor method detects single-source constant-time analysis zones to estimate directions of arrival and count sound sources.

Training the neural network with perturbed and non-perturbed TDOA data resolves localization errors caused by environmental noise and signal variations.

A magnetic camera mounts to a display panel front face to capture user images with natural eye contact during video conferences.