{"id":159031,"date":"2021-07-21T09:13:52","date_gmt":"2021-07-21T07:13:52","guid":{"rendered":"https:\/\/bandelin.com\/?post_type=docs&p=159031"},"modified":"2021-07-21T09:13:54","modified_gmt":"2021-07-21T07:13:54","password":"","slug":"the-concept-of-sound","status":"publish","type":"docs","link":"https:\/\/bandelin.com\/en\/docs\/wissen\/der-begriff-des-schalls\/","title":{"rendered":"The concept of sound"},"content":{"rendered":"
\n

Sound refers to pressure waves that can propagate in gases, liquids and solids, but not in a vacuum. The cause is always a sound source that causes a propagating mechanical deformation of the transmission medium.<\/p>\n\n\n\n

The sound effects in the propagation medium depend essentially on the wave form, the intensity of the source and the type of medium. In liquids and gases, for example, only longitudinal waves propagate; this means that the sound waves cause a periodic pressure and tension phase in the direction of oscillation.<\/p>\n\n\n\n

In acoustics, the following frequency ranges are distinguished.<\/p>\n\n\n\n

Infrasound<\/p>\n\n\n\n

0 Hz < f < 20 Hz
Audible sound<\/p>\n\n\n\n

16 Hz < f < 20 kHz
Ultrasound<\/p>\n\n\n\n

16 kHz < f < 1 GHz
Hypersonic<\/p>\n\n\n\n

f > 500 MHz
1 Hz = 1 oscillation per second = 1 hertz<\/p>\n\n\n\n

Ultrasound is the term used to describe sound waves above the threshold of human hearing in a range from around 16 kHz to 1 GHz. Ultrasound can also be generated with considerably more energy, i.e. \"louder\" than audible sound.<\/p>\n\n\n\n

Ultrasound applications are roughly divided into small-signal and power-sound applications<\/p>\n\n\n\n

Small signal applications: Intensity 100 kHz<\/p>\n\n\n\n

Power sound applications: Intensity > 1 W\/cm\u00b2 and frequency < 100 kHz<\/p>\n\n\n\n

There are also applications that do not fit into this scheme:
In medical therapy, low frequencies at low power are required, in the wafer industry, high power at high frequencies.<\/p>\n\n\n\n

Of the above-mentioned application areas, BANDELIN electronic specialises in<\/p>\n\n\n\n

Cleaning - Homogenisation - Medical therapy<\/p>\n\n\n\n

References<\/strong><\/p>\n\n\n\n

The following books provide an overall presentation of ultrasound. In addition, there are numerous publications on individual ultrasound applications.<\/p>\n\n\n\n

Bergmann, Ludwig: Ultrasound and its applications in science and technology; Stuttgart 1954<\/p>\n\n\n\n

Kuttruff, Heinrich: Physics and Technology of Ultrasound; Stuttgart 1988<\/p>\n\n\n\n

Lehfeldt, Wilhelm: Ultrasound in brief; W\u00fcrzburg 1973<\/p>\n\n\n\n

Millner, Rudolf: Wissensspeicher Ultraschalltechnik; Leipzig 1987<\/p>\n\n\n\n

Sorge, Georg and Hauptmann, Peter: Ultrasound in Science and Technology; Frankfurt a. M. 1985<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Mit Schall bezeichnet man Druckwellen, die sich in Gasen, Fl\u00fcssigkeiten und Festk\u00f6rpern, nicht aber im Vakuum ausbreiten k\u00f6nnen. Die Ursache ist immer eine Schallquelle, die eine sich fortpflanzende mechanische Verformung des \u00dcbertragungsmediums bewirkt. Die Schallwirkungen im Ausbreitungsmedium h\u00e4ngen wesentlich von der Wellenform, der Intensit\u00e4t der Quelle und der Art des Mediums ab. So breiten sich […]<\/p>\n","protected":false},"author":3,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"doc_category":[1926],"doc_tag":[],"class_list":["post-159031","docs","type-docs","status-publish","hentry","doc_category-wissen"],"acf":[],"year_month":"2026-10","word_count":290,"total_views":"70","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"J Bandelin","author_nicename":"jobandelin","author_url":"https:\/\/bandelin.com\/en\/author\/jobandelin\/"},"doc_category_info":[{"term_name":"Grundlagenwissen Kavitation","term_url":"https:\/\/bandelin.com\/en\/docs-category\/wissen\/"}],"doc_tag_info":[],"yoast_head":"\nDer Begriff des Schalls | BANDELIN electronic GmbH & Co. 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