SOUNDING

'Sounding' can refer to:

★ Determination the depth of water usually in the sea. Originally using a weighted line called a lead line, more recently using

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★ Echo sounding

★ Whale sounding, the act of diving by whales

★ an atmospheric sounding

★ various methods in telecommunications

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★ Ionospheric sounding

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★ Automatic sounding

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★ Automatic link establishment

★ Urethral sounding in medicine

★ various methods in geophysics:

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★ vertical electrical sounding (VES), see Schlumberger brothers

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★ electromagnetic sounding

★ sounding rockets which take measurements during suborbital flight

★ the present participle of sound