{"type":"rich","version":"1.0","title":"Capitolo 6 La propagazione del suono all'aperto \n","provider_name":"Coggle","provider_url":"https://coggle.it","thumbnail_url":"https://static.coggle.it/diagram/XFcThDDxOn2bqQdR/thumbnail","width":1920,"height":1200,"html":"<iframe width=\"1920\" height=\"1200\" src=\"https://embed.coggle.it/diagram/5c57138430f13a7d9ba90751\" frameborder=\"0\" allowfullscreen></iframe>"}