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  • Science of Sound
    • Sound
      • What is sound?
      • How do you characterize sounds?
        • Amplitude and Intensity
        • Frequency
        • Wavelength
      • How are sounds made?
      • What happens when sound pressures are large?
    • Sound Movement
      • How fast does sound travel?
      • Why does sound get weaker as it travels?
        • Sound Spreading
        • Sound Absorption
      • How does sound move?
        • Reflection
        • Refraction
        • Scattering
        • Reverberation
      • How does sound travel long distances? The SOFAR Channel
        • Sound Speed Minimum
        • Sound Travel in the SOFAR Channel
        • Sound Channel Variability
        • History of the SOFAR Channel
      • How does sound propagate from air into water?
      • How does sea ice affect how sound travels?
      • How does sound propagate through sediment?
    • Sound Measurement
      • How is sound measured?
      • What units are used to measure sound?
      • How are sounds viewed and analyzed?
      • How is hearing measured?
      • What sounds can people hear?
      • What sounds can animals hear?
    • Sounds in the Sea
      • What are common underwater sounds?
      • What are soundscapes?
      • How does sound in air differ from sound in water?
      • How do people and animals use sound in the sea?
      • Why do sounds have certain properties?
      • How will ocean acidification affect ocean sound levels?
      • How does marine life affect ocean sound levels?
      • How does shipping affect ocean sound levels?
      • Noise Field in the Arctic
    • Advanced Topics
      • What is intensity?
      • Introduction to Decibels
      • Introduction to Signal Levels
      • Signal Processing
      • Sound Pressure Levels and Sound Exposure Levels
      • Frequency Weighting of Signal Levels
      • Introduction to Phase
      • Ocean Noise Variability and Noise Budgets
      • Cylindrical vs. Spherical Spreading
      • Propagation from a sound source array in the near field and far field
      • Wave Front Propagation
      • How does sound travel in shallow water?
      • How does sound travel in very shallow waters?
      • SONAR Equation
        • Sonar Equation Example: Active Sonar
        • Sonar Equation Example: Passive Sonar
      • Detection Threshold for Sonar
      • Statistical Uncertainty
        • Measurement Errors
        • Natural Variability
        • False Positives and False Negatives
        • Statistical vs. Biological Significance
    • Science of Sound Summary
  • Animals and Sound
    • Importance of Sound
      • Why is sound important to marine animals?
    • Use of Sound
      • How do marine animals use sound?
      • Marine Mammal Communication
        • Individual-specific Vocalizations
        • Group-specific Vocalizations
        • Vocalizations Associated with Reproduction
        • Sounds Associated with Aggression
      • Marine fish communication
      • Marine invertebrate communication
      • Marine mammals feeding
      • Marine fish and invertebrates feeding
      • Marine mammal navigation
    • Sound Production
      • How do marine mammals produce sounds?
      • How do fish produce sounds?
      • How do marine invertebrates produce sounds?
    • Sound Reception
      • How do marine mammals hear?
        • Hearing in Land Mammals
        • Hearing in Amphibious Marine Mammals
        • Hearing in Cetaceans and Sirenians, the Fully Aquatic Ear
      • How do sea turtles hear?
      • How do aquatic birds hear?
      • How do fish hear?
      • How do marine invertebrates detect sounds?
    • Effects of Sound
      • Determine if a sound affects a marine animal
      • Potential effects of sound on marine mammals
        • Behavioral Changes in Mammals
        • Masking in Mammals
        • Hearing Loss in Mammals
        • Strandings
      • Potential effects of sound on marine fishes
        • Behavioral Changes in Fishes
        • Masking in Fishes
        • Hearing Loss in Fishes
        • Physiological Stress
        • Acoustic Issues Related to Diadromous Fishes
      • Measure marine mammal’s reaction to sound
        • Hearing Sensitivity Studies
        • Visual Observations
        • Acoustic Monitoring
        • Tagging Studies
        • Controlled Exposure Experiments
      • Moderate or eliminate the effects of human activities
        • Ship Quieting Technologies
      • Anthropogenic Sound Sources
        • Commercial Vessel Traffic
        • Echosounders
        • Pile driving
        • Seismic Airguns
        • Sonar
        • Wind Turbine
    • Advanced Topics
      • Blast Injury, Barotrauma, and Acoustic Trauma
      • Detection Threshold in Animal Hearing
      • What components of sound are used for hearing?
      • Acoustic Masking in Mammals
      • How did odontocete hearing evolve?
      • Marine Mammal Hearing Attenuation
      • Specialized Sounds in Cetacean Communication
      • Hearing Loss
    • Animals and Sound Summary
  • People and Sound
    • Navigation
      • How is sound used to navigate underwater?
      • How is sound used to measure water depth?
      • How is sound used to find objects on the ocean bottom?
    • Fishing
      • How is sound used to locate fish?
      • How is sound used to identify fish?
    • Communications
      • How is sound used to communicate underwater?
      • How is sound used to transmit data underwater?
    • Research Ocean Physics
      • How is sound used to measure temperature in the ocean?
      • How is sound used to measure global climate change?
      • How is sound used to measure currents in the ocean?
      • How is sound used to measure waves in the surf zone?
      • How is sound used to measure the upper ocean?
      • How is sound used to help make long-term measurements of the ocean?
    • Examine the Earth
      • How is sound used to study the Earth’s history?
      • How is sound used to explore for oil and gas?
      • How is sound used to measure, detect, and track oil?
      • How is sound used to study undersea earthquakes?
      • How is sound used to study underwater volcanoes?
      • How is sound used to map the seafloor?
      • How is sound used to research wind energy?
    • Investigate Marine Animals
      • How is sound used to study marine mammal distribution?
      • How is sound used to estimate marine mammal abundance?
      • How is acoustics used to monitor Arctic marine mammals?
      • How is sound used to protect marine mammals?
      • How is sound used to study the distribution of marine fishes?
      • How is sound used to measure plankton?
      • How is active acoustics used in fisheries research and management?
      • How is sound used to study coral reefs?
      • How is sound used to identify ecological hotspots?
    • Study Weather
      • How is sound used to measure rainfall over the ocean?
      • How is sound used to measure wind over the ocean?
    • National Defense
      • How is sound used to find submarines?
      • How is sound used to monitor nuclear testing?
      • How is sound used to monitor and defend harbors?
    • History of Underwater Acoustics
      • Pre-1800s
      • The 1800s
      • The Early 1900s
      • World War I: 1914-1918
      • The 1920s and 1930s
      • World War II: 1941-1945
      • The Cold War
    • People and Sound Summary
  • For Decision Makers
    • DOSITS Webinars
      • 2022 Webinar Series
        • Webinar Archive: Introduction to Underwater Acoustics
        • Webinar Archive: Acoustic Propagation Modeling
      • 2021 Webinar series
        • Webinar Archive: Passive Acoustic Monitoring Overview
        • Webinar Archive: Acoustic Tags
        • Webinar Archive: Causes of Hearing Loss in Marine Mammals
        • Webinar Archive: Noise Abatement Systems
      • 2020 Webinar Series
        • Webinar Archive: Fundamentals of Underwater Sound
        • Webinar Archive: NMFS Regulatory Approach
        • Webinar Archive: Passive Acoustics Data
        • Webinar Archive: An International Comparison
      • 2019 Webinar Series Archive: Anthropogenic Sound Sources
        • Webinar Archive: Seismic Sources
        • Webinar Archive: Pile Driving and Wind Turbines
        • Webinar Archive: Commercial Vessel Traffic
        • Webinar Archive: Sonar, Echosounders & Military Sonar
      • 2018 Webinar Series Archive
        • Webinar Archive: Sound Reception in Marine Mammals
        • Webinar Archive: Potential Effects of Sound on Marine Mammals
        • Webinar Archive: Sound Production and Reception in Teleost Fishes
        • Webinar Archive: Potential Effects of Sound on Marine Fishes
      • Webinar Archive: 2015-2016 Series
        • Webinar Archive: Science of Sound
        • Webinar Archive: Marine Animal Sound Production and Reception
        • Webinar Archive: Potential Effects of Sound on Marine Mammals
        • Webinar Archive: Potential Effects of Sound on Fishes
        • Webinar Archive: Summary and Questions
      • DOSITS Webinar Testing and Troubleshooting Tips
    • DOSITS Videos
      • Science of Sound Video
      • Marine Mammal Hearing Video
      • Hearing in Marine Fishes
      • Ecological Risk Assessment Video
    • Decision Maker Tutorials
      • Decision Makers Effects of Sound Tutorial Introduction
        • Tutorial: Mammals – Behavior Changes
        • Tutoria:l Mammals – Masking
        • Tutorial: Mammals – Hearing loss
        • Tutorial: Mammals – Strandings
        • Tutorial: Fishes – Behavioral Change
        • Tutorial: Fishes – Masking
        • Tutorial: Fishes – Hearing Loss
        • Tutorial: Fishes – Physiological Stress
      • Determine if a Sound Affects a Marine Animal Tutorial Introduction
        • Tutorial: Sound Levels at Distance and Depth
        • Tutorial: Where are marine animals likely to be located relative to the source?
        • Tutorial: Sound Level Exposure
        • Tutorial: Can Animals Sense These Sounds Part I
        • Tutorial: Can Animals Sense These Sounds Part II
      • Decision Makers Science of Sound Tutorial Introduction
        • Science Tutorial: What is Sound?
        • Science Tutorial: How do you characterize sounds?
        • Science Tutorial: Amplitude (Intensity)
        • Science Tutorial: Frequency
        • Science Tutorial: Wavelength
        • Science Tutorial: Sound Speed
        • Science Tutorial: Sound Spreading
        • Science Tutorial: Sound Absorption
        • Science Tutorial: How are sounds viewed and analyzed?
        • Science Tutorial: How does sound in air differ from sound in water?
        • Science Tutorial: Sound Pressure Levels and Sound Exposure Levels
      • Decision Makers Sound Source Tutorial Introduction
        • Tutorial: Commercial Vessel Traffic
        • Tutorial: Echosounders
        • Tutorial: Pile Driving
        • Tutorial: Seismic Airgun
        • Tutorial: Sonar Source
        • Tutorial: Wind Turbine
    • Reference List: Animals and Sound
    • DOSITS Resources for Decision Makers
    • Units Page for Regulators
    • Seismic Airgun Fact Sheet
    • UN Ocean Decade Ocean Ambient Sound
    • Scientific Method
    • Scientific Uncertainty
  • DOSITS Webinars
    • 2022 Webinar Series
    • 2021 Webinar Series
    • 2020 Webinar Series
    • 2019 Webinar Series Archive: Anthropogenic Sound Sources
    • 2018 Webinar Series Archive
    • Webinar Archive: 2015-2016 Series
    • DOSITS Webinar Privacy Policy
    • DOSITS Webinar Testing and Troubleshooting Tips
  • Galleries
    • Audio Gallery
      • Marine Mammals
        • Baleen Whales
          • Blue Whale
          • Bowhead Whale
          • Bryde’s Whale
          • Fin Whale
          • Gray Whale
          • Humpback Whale
          • Minke Whales
          • North Atlantic Right Whale
          • Sei Whale
          • Southern Right Whale
        • Toothed Whales
          • Amazon River Dolphin, Boto
          • Baiji, Yangtze River Dolphin
          • Beaked Whales
          • Beluga Whale, White Whale
          • Bottlenose Dolphin
          • Common Dolphin
          • Dall’s Porpoise
          • False Killer Whale
          • Finless Porpoise
          • Harbor Porpoise
          • Killer Whale, Orca
          • Australian Humpback Dolphin
          • Indo-Pacific Humpback Dolphin
          • Melon-headed whale
          • Narwhal
          • Pantropical Spotted Dolphin
          • Pilot Whale
          • Risso’s Dolphin
          • Rough-toothed dolphin
          • Sperm Whale
          • Spinner Dolphin
          • White-sided Dolphin
        • Pinnipeds
          • Bearded Seal
          • California Sea Lion
          • Crabeater Seal
          • Harbor Seal
          • Hawaiian Monk Seal
          • Hooded Seal
          • Northern Fur Seal
          • Leopard Seal
          • Ribbon Seal
          • Ringed Seal
          • Walrus
          • Weddell Seal
        • Sirenians
          • Manatee
      • Marine Invertebrates
        • Mantis Shrimp
        • Snapping Shrimp
        • Sea Urchin (Kina)
        • Spiny Lobster
      • Fishes
        • Arctic Char
        • Atlantic Croaker
        • Bar Jack
        • Barred Grunt
        • Bigeye Scad
        • New Zealand Bigeye
        • Black Drum
        • Bluestriped Grunt
        • Clownfish
        • Dusky Damselfish
        • Garibaldi
        • Gulf Corvina
        • Haddock
        • Longhorn Sculpin
        • Lusitanian toadfish
        • Nassau Grouper
        • Northern Seahorse
        • Oyster Toadfish
        • Painted Goby
        • Plainfin Midshipman
        • Red Drum
        • Red Grouper
        • Rock Hind
        • Sand Seatrout
        • Spotted Seatrout
        • Hardhead Sea Catfish
        • Silver Perch
        • Stoplight Parrotfish
        • Striped Searobin
        • Weakfish
      • Other Natural Sounds
        • Earthquake
        • Hurricanes
        • Hydrothermal vents
        • Ice Cracking
        • Iceberg Collisions
        • Lightning
        • Rainfall
        • Submarine Volcanic Eruptions
        • Waves on Beach
      • Anthropogenic Sounds
        • Airgun
        • ATOC Transmission
        • Bubble Curtain
        • Dredging
        • Explosive Sound Sources
        • Icebreaker
        • Ocean Acoustic Tomography Transmission
        • Outboard Motor
        • Personal Water Craft (PWC)
        • Pile Driving
        • Ship
        • Sonar
        • SURTASS LFA Sonar
        • Tidal Turbine
        • Torpedo
        • Underwater Breathing Apparatus
        • Wind Turbine Sounds
      • Audio Gallery Summary
    • Technology Gallery
      • Basic Technology
        • Acoustic Release
        • Explosive Sound Sources Technology
        • Geophone
        • Hydrophone/Receiver
        • Hydrophone Arrays
        • Projector (sound source)
        • Projector Array
        • Vector Sensors
        • Ocean Observatories
      • Observing the Sea Floor
        • Airgun Technology
        • Echosounder
        • Multibeam Echosounder
        • Side Scan Sonar
        • Sub-bottom Profiler
      • Observing Ocean Currents and Temperature
        • Acoustic Current Meters
        • ADCP (Acoustic Doppler Current Profiler)
        • Acoustic Tomographic Mooring
        • Inverted Echosounders
        • RAFOS Floats
        • SOFAR Floats
        • Acoustic Rain Gauge (ARG)
        • WOTAN: “Wind Observations Through Ambient Noise”
      • Observing and Monitoring Marine Animals
        • Acoustic Fish Tags
        • Fish Finding Sonar
        • Archival Marine Acoustic Recording Units (ARUs)
        • Real-time Passive Acoustic Sensors
        • Passive Acoustic Recording Tags
        • Autonomous Surface Vehicles
        • Underwater Gliders
        • Underwater Acoustic Cameras
      • Locating Sources of Sound
        • Sound Surveillance System (SOSUS)
        • Sonobuoys
      • Locating objects using sonar
        • Sonar Technology
        • SURTASS LFA Sonar Technology
        • Forward Looking Sonar
      • Communication Technology
        • Acoustic Modem
      • Navigation Technology
        • Acoustic Transponders
        • Underwater GPS
      • Technology Gallery Summary
    • Scientist Gallery
      • Dr. Rossby
      • Dr. Miller
      • Dr. Benoit-Bird
      • Dr. Au
      • Dr. Ketten
    • Career Gallery
  • Resources
    • Educator Resources
    • Media Resources
    • Student Resources
    • Meetings
      • DOSITS 10th Anniversary Symposium
      • Modeling and Prediction of Ocean Ambient Sound
    • For Decision Makers
  • Tutorials
    • Science of Sound Tutorial: Introduction
      • Tutorial: What is Sound?
      • Tutorial: Intensity or Loudness
      • Tutorial: Frequency or Pitch
      • Tutorial: Speed of Sound
      • Tutorial: Wavelength
      • Tutorial: Sound Spreading
      • Tutorial: Reflection
      • Tutorial: Refraction
      • Tutorial: Scattering
      • Tutorial: Sound Channel
    • Effects Tutorial Introduction
      • Effects Tutorial Overview
      • Tutorial: Behavioral Changes
      • Tutorial: Masking
      • Tutorial: Hearing Loss
      • Tutorial: Physiological Stress
      • Tutorial: Strandings
      • Tutorial: How do you determine if a sound affects a marine animal?
      • Tutorial: How can we moderate or eliminate the effects of human activities?
    • Technology Tutorial Introduction
      • Tutorial: Projector (Sound Source)
      • Tutorial: Sonar
      • Tutorial: Measure Water Depth
      • Tutorial: Find Objects on the Sea Floor
      • Tutorial: Find Fish
      • Tutorial: Communicate Underwater
      • Tutorial: Measure Temperature
      • Tutorial: Measure Currents
      • Tutorial: Study the Sea Floor
  • DOSITS FAQ
  • Facts and Myths
  • Hot Topics
  • Interactive iBooks
Home/Science of Sound/Advanced Topics in Sound
Advanced Topics in SoundChris Knowlton2017-08-02T23:57:48-05:00
  • What is intensity?
  • Introduction to Decibels
  • Introduction to Signal Levels
  • Signal Processing
  • Sound Pressure Levels and Sound Exposure Levels
  • Frequency Weighting of Signal Levels
  • Introduction to Phase
  • Ocean Noise Variability and Noise Budgets
  • Cylindrical vs. Spherical Spreading
  • Propagation from a sound source array in the near field and far field
  • How does sound move? Wave Propagation and Huygens’ Principle
  • How does sound travel in shallow water?
  • How does sound travel in very shallow waters?
  • SONAR Equation
    • Sonar Equation Example: Active Sonar
    • Sonar Equation Example: Passive Sonar
  • Detection Threshold for Sonar
  • Statistical Uncertainty
    • Measurement Errors
    • Natural Variability
    • False Positives and False Negatives
    • Statistical vs. Biological Significance
                 


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