https://www.ainonline.com/aviation-news/business-aviation/2013-05-23/aerion-revisits-ssbj-engine-plans-2020-certification
Aviation International News is the industry's best read and most authoritative news publication, covering all aspects of aviation: business, military and...
aviation international newsaerionssbjengineplans
https://www.ainonline.com/aviation-news/business-aviation/2017-07-25/tsagi-plans-icao-chapter-14-compliant-ssbj
Russian company expects aircraft to produce a sonic boom with intensity less than 72 dBA or 78 dB SPL (sound pressure level).
aviation international newstsagiplansicaochapter