用超声波实现多通道定向音频，佩戴者可听专属解说，环境音不受影响。
UltrasonicSpheres: Localized, Multi-Channel Sound Spheres Using Off-the-Shelf Speakers and Earables
- 用不同超声载频编码多路音频，单个音箱即可发射
- 佩戴耳塞者可解调选定频道，听懂指定语言讲解
- 无需配对或追踪，适合博物馆等公共空间使用
我们展示UltrasonicSpheres系统，一种基于可穿戴耳塞解码超声信号生成可听声音的新型定位音频技术。与传统波束成形方案不同，该系统仅需一个超声波扬声器，通过多个不同的超声载频编码多路音频通道。佩戴声学透明耳塞的用户可解调其选定的音频流，例如特定展区的多语言导览，同时保持对周围环境声音的完整感知。声音呈现具有空间感，让人感觉声源来自物理位置本身。该技术实现个性化、局部化音频推送，无需配对、跟踪或额外基础设施。重要的是，未佩戴设备的访客不受影响，因超声信号人耳不可听。演示邀请参与者体验多个共存的音频区域，展现该系统在公共空间中无干扰个性化音频交付的能力。
原文摘要 · Abstract (English)
We present a demo of UltrasonicSpheres, a novel system for location-specific audio delivery using wearable earphones that decode ultrasonic signals into audible sound. Unlike conventional beamforming setups, UltrasonicSpheres relies on single ultrasonic speakers to broadcast localized audio with multiple channels, each encoded on a distinct ultrasonic carrier frequency. Users wearing our acoustically transparent earphones can demodulate their selected stream, such as exhibit narrations in a chosen language, while remaining fully aware of ambient environmental sounds. The experience preserves spatial audio perception, giving the impression that the sound originates directly from the physical location of the source. This enables personalized, localized audio without requiring pairing, tracking, or additional infrastructure. Importantly, visitors not equipped with the earphones are unaffected, as the ultrasonic signals are inaudible to the human ear. Our demo invites participants to explore multiple co-located audio zones and experience how UltrasonicSpheres supports unobtrusive delivery of personalized sound in public spaces.
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