Monitorizarea la scara globala, de unde acustice si gravitationale pentru studierea dinamicii atmosferei
The monitorizing of acoustic and gravitational waves for the study of atmosphere dynamics

Summary/Abstract: In general, sound waves are longitudinal waves. Sound waves in the air may be heard by the person in the case where the frequency is in the range of 20–20,000 Hz. Ultrasound inaudible to humans and higher frequency of 20,000 Hz. At the other end of the spectrum, the sound can not be heard when the frequency is below 20 Hz. Infrasound technology has been mainly used to study specific events as polar auroras (CR Wilson, 1973, Wilson CR 1975., Wilson and others2010), severe weather (Bowman HS, AJ Bedard 1971)., Man-made disturbances (nuclear experiments, eg) (L Liszka 1974), meteorites (DO Revelle 1976), solar eclipses (Farges T et al 2003), or volcanic eruptions (Delclos C et al 1990), glaciers, infrasound produced by the firing of rockets into space missile re-entry and exit space, waves generated by commercial aircraft jet aircraft subsonic signals (Le Pichon a and others 2002). Strong variations of the speed of sound derived from infrasound parameters were related to air circulation and changes in stratospheric sudden warm-products (Mutschlecner JP, RW Whitaker2010). IMS network includes acoustic array evenly distributed across the globe. With these waves can be detected in the atmosphere and therefore the dynamics of high intensity disturbances as storms atmosphere. The net‑work is complemented by national infrasound stations that are not part of IMS. Romania is one of the countries that signed the agreement with the CTBT, to provide data recorded at station Ploştina.

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