{
    "byline": null,
    "charset": "UTF-8",
    "dir": null,
    "excerpt": "Invisible and relentless, sound is seemingly just there, traveling through our surroundings to carry beautiful music or annoying noises. In this article I\u2019ll explain what sound is, how it\u2019s created and propagated.",
    "lang": null,
    "length": 47059,
    "publishedTime": null,
    "siteName": null,
    "title": ""
}