{"id":"S2003009049","label":"Ultrasonic waves--Attenuation","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2003009049","normalized_label":"ultrasonic waves--attenuation","broader":["http://id.loc.gov/authorities/subjects/sh2003007020"],"aliases":["Ultrasonic attenuation","Ultrasonic wave attenuation"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2003009049","provider":"lcsh","revision":"a64df38fcd0d3adf","taxonomy_revision":"f050b5d4780b1289","title":"Ultrasonic waves--Attenuation","url":"/topics/S2003009049","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5224259158119178754","address_version":"morton4x16-v1","coordinates":[0,477,36344,25600],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}