Auroral crackling sounds and Schumann resonances

Unto K. Laine*

*Tämän työn vastaava kirjoittaja

    Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

    Abstrakti

    Observations of unusual sounds like claps, snaps, and cracklings from a serene sky under actively moving, bright aurora borealis have been reported during a long history. Since year 2000 the auroral sounds have been studied in Finland. In 2011 a sound source associated with the aurora was localized for the first time in the sky approximately 70 meters from the ground. To accommodate for the surprisingly low altitude of the source, a hypothesis that the sounds are produced by corona discharges in a temperature inversion layer at the observed altitude was published in 2016. The focus of the present paper is in the acoustic analysis of the crackling sounds that are sequences with complex temporal structures. It is shown that the sounds share similar rhythmical patterns, which are connected to the electromagnetic resonances in the atmosphere, also known as the Schumann resonances

    AlkuperäiskieliEnglanti
    OtsikkoProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
    KustantajaCanadian Acoustical Association
    Sivumäärä8
    ISBN (elektroninen)9781999181000
    TilaJulkaistu - 7 heinäk. 2019
    OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
    TapahtumaInternational Congress on Sound and Vibration - Montreal, Kanada
    Kesto: 7 heinäk. 201911 heinäk. 2019
    Konferenssinumero: 26

    Julkaisusarja

    NimiProceedings of the International Congress on Sound and Vibration
    ISSN (elektroninen)2329-3675

    Conference

    ConferenceInternational Congress on Sound and Vibration
    LyhennettäICSV
    Maa/AlueKanada
    KaupunkiMontreal
    Ajanjakso07/07/201911/07/2019

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