I can't speak for SilverPush, but Google Tone definitely has an Ultrasonic component [1] as does a version of Chirp [2]. Both work through consumer grade speake

I can't speak for SilverPush, but Google Tone definitely has an Ultrasonic component [1] as does a version of Chirp [2]. Both work through consumer grade speakers/DACs/devices. [1] https://www.reddit.com/r/AskEngineers/comments/374876/lets_talk_about_google_tone/ https://www.reddit.com/r/AskEngineers/comments/374876/lets_t... [2] https://vimeo.com/177586203 https://vimeo.com/177586203