Ultrasonic Directional Speaker

An ultrasonic directional speaker is an audio device that produces highly focused sound beams through ultrasonic frequency modulation, enabling targeted audio transmission to specific individuals or groups without broader audience reception. These specialized devices concentrate sound energy in narrow beams, preventing sound from dispersing across rooms and enabling private audio communication in public environments where conventional speakers would broadcast audio to all nearby listeners.

Operating principle employs ultrasonic carrier frequencies above human hearing range, typically 40 kHz or higher. Audio content modulates this ultrasonic carrier creating sidebands within human hearing range. Nonlinear acoustic effects in air demodulate the ultrasonic signal converting it back to audible audio only in the direct beam path. Outside the beam coverage, no audible sound reaches listeners, enabling private transmission to targeted recipients.

Beam directionality depends on ultrasonic frequency with higher frequencies producing narrower beams. Frequency selection balances directionality against air absorption losses increasing with frequency. Phased array transducers steer beams without mechanical repositioning enabling dynamic targeting. Output sound pressure levels enable audio transmission across extended distances despite ultrasonic carrier absorption.

Applications span military command post communications, customer guidance at retail locations, medical facility patient communication, and entertainment venue directed audio. Privacy-sensitive environments benefit from preventing audio broadcast to unintended listeners.

In Pakistan, military command centers employ ultrasonic speakers for private communications during tactical operations. Retail facilities use them for customer guidance without disturbing other shoppers. Medical facilities employ them for patient privacy during consultations. Exhibition centers utilize them for directional audio at individual displays.

Tactical Supply Pakistan supplies ultrasonic directional speakers for military, retail, medical, and entertainment applications across Pakistan.