Microphones TRIZ Cases

Integrated sensors let a headset adjust volume and trigger audio, visual, or vibration alerts when surrounding conditions change.

A transconductance amplifier feeds a current-input ADC to cut microphone noise, improve SNR, and avoid overload distortion in compact devices.

Ratiometric reference generation lets a MEMS microphone interface circuit maintain PSRR, AOP, and SNR across wide supply voltages.

A shared ported chamber lets one speaker radiate directly while another drives a side chamber, cutting distortion and preserving clarity at high SPL.

Mutual-capacitance sensing measures graded force on an earphone housing, avoiding tap-induced audio disruption and reducing false inputs.

A capacitor-resistor decoupling circuit absorbs mute-switch noise in telephone microphones, preserving call quality during switching.

Using two capacitive contact points, this earbud case distinguishes true wearing from hand or table contact to improve detection accuracy and battery life.

Double differential excitation with a charge pump cancels offsets and flicker noise while boosting SNR in MEMS capacitive transducers.

Electric-field alignment of dielectric particles lets tactile transducers tune stiffness, sensitivity, and sensing range without remanufacturing.

Ratiometric reference generation lets a MEMS acoustic transducer interface maintain PSRR and AOP across wide supply-voltage changes.

Integrated current-source test circuitry measures MEMS transducer capacitance for calibration, offsetting process and environmental variation.

An attachable cover adds microphones and switches processing modes to improve mobile audio capture without bulky external equipment.

Adaptive beamforming and source localization let a compact microphone array enhance target speech while suppressing ambient noise.

A dual-amplifier differential output extends MEMS capacitive microphone dynamic range while suppressing noise and avoiding overload distortion.

Geofencing triggers ambient sound mixing in a hearing device, balancing audio playback with safety awareness in changing noise environments.

A decimation filter in the ADC corrects transducer resonance digitally, flattening signal-band response without a separate analog filter.

Multiple ADC paths with level-based selection and glitch removal extend microphone dynamic range while cutting power and audible artifacts.

Sound level monitoring pauses in-vehicle media when listening is interrupted, reducing manual control while conserving power and bandwidth.

Adaptive bias and gain control raises analog microphone acoustic overload point while reducing source follower distortion.

3D source position and path loss let microphone gains hold speaker volume steady while keeping ambient sound levels consistent.

An open-canal earbud routes audio from the concha while keeping the ear canal unobstructed, improving comfort and awareness of external sounds.

Embedding microphones near or on planar diaphragms cuts ANC delay and distortion while preserving clear, high-end headphone sound.

Ultrasonic air pulses from a membrane chamber enable full-range sound in a compact speaker while reducing distortion and component count.

Sub-wavelength resonator channels passively amplify bass in compact speakers, improving low-frequency fidelity while reducing distortion.

Rear-mounted bobbin actuation turns the display panel into a forward-facing speaker, improving sound direction, quality, and space use.

A parallel analog path and digital filter offset converter delay, improving noise reduction while preserving digital mode selection and sound quality.

By removing decimation filtering and outputting a noise-shaped PDM signal, this microphone assembly cuts latency while preserving SNR.

Drive signals are adjusted from audio content, radiation patterns, and distortion margins to keep directional speaker arrays clear at different placements.

A cantilevered piezoelectric resonator detects sound by tracking shear resonance shifts, reducing damping and particle sensitivity.

Automatic equalization matches external microphone input to the built-in mic response, keeping call audio consistent across accessories.

Paired omnidirectional microphones adapt low-frequency filtering to suppress wind noise and proximity bass while preserving cardioid response.

Deep learning combines in-ear and external microphone signals to remove noise and restore natural speech in noisy environments.

A low-power audio detector gates a precise pattern-matching clock, cutting standby power while preserving wake-word accuracy.

Gain settings are conveyed through supply or output terminals while adaptive audio amplification preserves dynamic range in low-voltage circuits.

Dynamic VGA gain and filter tuning in ANR headphones reduce low-frequency overload artifacts while preserving noise reduction.

Folded sub-wavelength channels passively amplify bass in compact speakers by extending acoustic path length without larger diaphragms.

Beamforming and multichannel gain shaping adapt audio to individual hearing sensitivity while reducing noise exposure and delay in hearing-loss detection.

Superimposed signals on existing supply terminals convey gain settings, enabling high-dynamic-range audio amplification without extra pins.

A clip-mounted earbud holder uses acoustic absorption to attenuate high input sound to a safer range before transmission to the fetus.

Inductive power and data links let a headset accessory store audio profiles, add programmable controls, and drive immersive visual feedback.

Ultrasonic PAM driving lets one sound-producing element cover wide audio frequencies, including bass, without multiple drivers or large enclosures.

Ultrasonic PAM air pulses let one speaker cover wide frequency output, including bass, without multiple drivers or large enclosures.

On-chip current-source timing measures MEMS transducer capacitance and adjusts bias to offset process and environmental variation.

Capacitive feedback with a programmable capacitor boosts MEMS microphone sensitivity while keeping noise and power consumption low.

Multiple earpiece microphones switch between beamforming modes to isolate the user's voice and suppress background and wind noise.

A vertically stacked cylindrical array captures 3D sound with high azimuth resolution while reducing microphone count and spherical processing complexity.

Adds speaker and voice input to a franking machine while filtering noise and securing remote commands to avoid false activation.

Ultrasonic PAM pulses let one sound-producing unit deliver bass and treble with high sound pressure, reducing multi-driver complexity and enclosure size.

Opposite-polarity high-voltage excitation boosts MEMS capacitive accelerometer SNR by cancelling offsets and flicker noise with modest power cost.

A strap-button-mounted speaker with amplifier and stabilizer lets electric guitars play amplified sound without separate external gear.