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
  • Echo sounding
• Whale sounding, the act of diving by whales
• various methods in telecommunications
  • Ionospheric sounding
  • Automatic sounding
  • Automatic link establishment
• Urethral sounding in medicine
• various methods in geophysics:
  • vertical electrical sounding (VES)
  • electromagnetic sounding