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     1  ~ 2014 aug 10build a hydrophoneHow to Build a Hydrophone - DOSITSHow to Build a Hydrophone . Introduction: It was once thought that the oceans were a silent place. However, if you were to drop a hydrophone or underwater ...
     2  +2 2014 sep 06science of soundDOSITS: Science of Sound SummaryDiscovery of Sound in the Sea. Home · Science of Sound · Animals and Sound · People and ... DOSITS Home > Science of Sound > Science of Sound Summary.
     5  +15 2014 sep 05hears and soundDOSITS: What sounds can we hear ?Humans don't hear all sounds. For example, we can't hear the sound a dog whistle makes, but dogs can hear that sound. Marine animals can often hear sounds  ...
     5  +2 2014 aug 07sounds of the seaDiscovery of Sound in the SeaFollow this link to skip to the main content. Discovery of Sound in the Sea . Home. Science of Sound · Animals and Sound · People and Sound · Audio Gallery.
     5  -1 2014 aug 05sound energy researchDOSITS: How is sound used to research wind energy ?Wind energy is increasingly being used as an alternative energy source. As wind turbines have moved from land into ocean waters, sound is being used to find ...
     6  ~ 2014 aug 12what is soundDOSITS: What is sound ?People use sound all the time. We rely on sounds to communicate. Unexpected noises may warn us of danger. The sounds we hear tell us a lot about our ...
     9  -2 2014 sep 24pilot whaleDOSITS: Pilot WhalePilot whales are large dolphins with a long body and bulbous head with prominent melon. They average 5 m (16 ft) in length but can reach lengths of 7.6 m (25 ...
     9  -4 2014 aug 31audio galleryDOSITS: Audio Gallery SummaryDOSITS Home > Audio Gallery > Audio Gallery Summary. Jump to Topic: Audio Gallery , Interactive, Marine Mammals, Baleen Whales, Blue Whale, Bowhead ...
     9  -1 2014 aug 22sound of sea
     9  +5 2014 aug 21how does sound travelDOSITS: How fast does sound travel ?In 1826 on Lake Geneva, Switzerland, Jean-Daniel Colladon, a physicist, and Charles-Francois Sturm, a mathematician, made the first recorded attempt to ...
     10  ~ 2014 aug 22science of uncertaintyDOSITS: Scientific UncertaintyScientific uncertainty is inherent in the scientific process. Often there is consensus in the scientific community about a specific topic or theory. However, progress ...
     12  ~ 2014 aug 24submarine transmission compactDOSITS: How is sounds used to transmit data underwater ?Computers use digital data to transmit and receive information including e-mail ... This technology can also be used to control small , unmanned submarines , ...
     13  +16 2014 sep 20a false sieceDOSITS: False Positives and False NegativesScientists call this a false positive. It is also called a Type I error. If one instead concludes that there is not a real difference between the means when, in fact, ...
     13  ~ 2014 sep 18malaysia hot searchDOSITS: Hot Topic - Discovery of Sound in the SeaThe search for Flight MH370 will continue using multibeam sonar or side scan sonar. On March 8, 2014, a Malaysian Airlines Boeing 777, flight MH370, ...
     14  -5 2014 aug 24recording data from archivesDOSITS: Archival Marine Acoustic Recording Units (ARUs)One type of passive acoustic sensor is the archival marine acoustic recording unit (ARU). Here, archival means that the data are collected and stored onboard ...
     15  +3 2014 sep 25sound of the sea
     15  +3 2014 aug 26sound of the waterDOSITS: How is sound used to measure water depth?The depths of the ocean have been charted since the early days of sailing using a method called sounding . A sounding line (a rope that has a weight attached) ...
     15  -5 2014 jul 20under ater animalsDOSITS: Media Backgrounder- How do animals hear under water?The sounds produced by many marine mammals travel for miles. Underwater sound allows marine animals to gather information and communicate with each ...
     15  -5 2014 jul 20under water anumals
     16  +6 2014 sep 18minke whale photoDOSITS: Minke WhalePhoto of Minke Whale . Minke whale in Monterey Bay. Photo courtesy of Tom Jefferson ... Click either choice below to hear the minke whale "boing" vocalization: ...
     18  +4 2014 aug 01alaskan ring sealsDOSITS: Ringed SealRinged seal recorded in the Arctic Ocean, off Point Barrow, Alaska . ... Ringed seals have a circumpolar distribution in the northern hemisphere and can be found ...
     19  -6 2014 aug 15sea fishing fish findersFishing - Discovery of Sound in the SeaFish finders detect the presence of fish primarily by detecting the air in their swim bladders. The air conserved in the swim bladder changes the sound path and ...
     20  -6 2014 aug 15amazon river dolphinDOSITS: Amazon River DolphinThe Amazon river dolphin is entirely riverine, inhabiting river channels, tributaries and lakes. It goes by many names and is most commonly referred to as "boto" ...
     21  ~ 2014 aug 31unique rain gaugesDOSITS: Acoustic Rain Gauge (ARG)Acoustic Rain Gauges (ARGs) have been developed that can be placed safely beneath the ocean surface to record the sounds produced by rain. The unique  ...
     21  +54 2014 aug 09how to measure currentDOSITS: How is sound used to measure currents in the ocean?An instrument called an Acoustic Doppler Current Profiler or ADCP is often used to measure the current in specific places like shipping channels, rivers and ...
     21  +14 2014 aug 08submarine sonar soundDOSITS: Active Sonar Example - Discovery of Sound in the SeaAlthough the characteristics of submarine search sonars vary substantially for different systems, typical sizes of the terms in the sonar equation can be obtained  ...
     21  +2 2014 jul 19whale sounds freeDOSITS: Humpback Whale - Discovery of Sound in the SeaSongs can be typically heard in their winter breeding grounds (e.g., Hawaii), but this recording of a humpback whale singing was actually taken in one of their ...
     22  -7 2014 sep 26is a fish a invertebrateDOSITS: Marine fish and invertebrates feedingHow do marine fish and invertebrates use or make sound when feeding? The most common sounds associated with feeding fish are simply a result of chewing  ...
     22  -4 2014 aug 19false killer whaleDOSITS: False Killer WhaleDescription False killer whales got their common name because their skulls are similar to killer whales , not because their physical appearances are similar.
     23  +1 2014 aug 29sound wave vectorDOSITS: Vector SensorsVector sensors can determine the direction in which a sound wave is traveling using measurements made at a single point in space. Individual hydrophones are ...
     23  -2 2014 jul 31killer whale soundsDOSITS: Killer Whale - Discovery of Sound in the SeaDuring the night, a fishing pole was used to cast out and reel in a glow stick ( Cylume stick) in Johnston Strait, Vancouver, BC. This caught the curiosity of several ...
     24  +1 2014 aug 20sterling pub co incDOSITS: Science of Sound in the Sea ResourcesSound Science. Perseus Publishing. 96 p. Levine, Shar and Johnstone, Leslie. 2000. Science and Sound of Music. Sterling Publishing Co. Inc . New York, NY.
     24  +64 2014 aug 07angle of reflectionDOSITS: ReflectionReflection. We have probably all heard echoes - when our voices repeat in large ... Well, the trick is that the angle of incidence is equal to the angle of reflection .
     25  ~ 2014 jul 31advanced marine educationMarine Educator - DOSITSB.S. in biology, marine biology, environmental science/ education or related field; Advanced degree (Masters and/or PhD) in marine science, environmental ...
     26  +35 2014 jul 24side imaging sonarDOSITS: Side Scan SonarOne of the best systems for imaging large areas of the ocean floor is side scan sonar . The basic concept is much the same as the basic echosounder; however,  ...
     27  -1 2014 jul 31underwater sound effectsDOSITS: Potential effects of sound on marine fishesWhat are the potential effects of sound on marine fishes? ... However, much less is currently known about the effects of underwater sound on fishes than on ...
     30  -6 2014 aug 17ship on the oceanDOSITS: How is sound used to find objects on the ocean bottom?Side scan sonar is one method used to look at the detail of the ocean floor. Side scan sonar instruments are towed behind ships and often called towfish or tow ...
     31  +7 2014 jul 28ocean wave soundsSound is a wave, similar to the ripples on a pond or the ocean waves you might see crashing on a beach. Instead of being a wave on the ocean surface, sound  ...
     32  -14 2014 sep 10body by fishDOSITS: How do fish hear?Two independent but related sensory systems used by fish to detect sound are ... The difference between the motion of the fish's body and the otoliths bend or ...
     35  -1 2014 aug 22animals and their soundsDOSITS: How do marine mammals produce sounds ?These animals are not thought to produce sounds using their vocal folds. Marine mammals also have the capability to produce and use other sounds for acoustic ...
     35  -26 2014 aug 17sea fishing fishfindersHow is sound used to locate fish ? - Discovery of Sound in the Sea
     38  -3 2014 aug 27people and animalsDOSITS: How do people and animals use sound in the sea?People and marine animals use sound in the sea to accomplish many tasks. Since light travels relatively short distances in the ocean, sound is often used by ...
     38  -15 2014 aug 10example of scientific methodDOSITS: Scientific MethodScientists use the Scientific Method as the orderly process to ask these ... For example , correlation (when two things happen at the same time and in the same  ...
     39  +2 2014 sep 25soundscanDOSITS: What sounds can animals hear?Most animals, including marine mammals and fishes, hear best at the frequencies they produce and have varying sensitivity to sounds of different frequencies.
     39  -1 2014 jul 26ocean waves sound
     40  ~ 2014 oct 03underwater volcanic eruptionHow is sound used to study undersea earthquakes and volcanic Undersea earthquakes and volcanic eruptions (seismic events) make low frequency sounds. The sounds they make can be heard far away from the seismic ...
     40  +6 2014 oct 03minimum ocean shippingDOSITS: Sound Speed MinimumThe speed at which sound travels in the ocean is affected by temperature, salinity , and pressure. Sound travels faster with increasing temperature, salinity, and ...
     40  +61 2014 jul 16uses of sound energy
     43  -26 2014 aug 31sounds of the oceanDOSITS: How is sound used to measure temperature in the ocean ?A typical speed of sound in water near the ocean surface is about 1520 meters per second. That is more than 4 times faster than the speed of sound in air.
     43  +1 2014 jul 20depth of oceansDOSITS: How is sound used to measure water depth ?The depths of the ocean have been charted since the early days of sailing using a method called sounding. A sounding line (a rope that has a weight attached) ...
     44  -7 2014 aug 12side scan sonar
     46  ~ 2014 aug 29copier paper sheetHow to convert a copy paper box into a representative section of the 1 copy paper box (11" x 17" x 9 1/2"deep) with cover (11 1/2" x 18") ... Rigid foam sheet insulation (found at home supply stores in pink ), 1 sheet of 2'x8' will ...
     46  -2 2014 aug 16hump back whalesDOSITS: Humpback Whale
     46  -13 2014 aug 13range of human hearingDOSITS: How is hearing measured?Behavioral hearing tests are conducted on animals that can respond if they hear ... An audiometric curve shows the range of sounds that humans can hear, with ...
     48  +9 2014 aug 12over the oceanDOSITS: How is sound used to measure rainfall over the ocean ?Rain falling on the ocean makes a loud and distinctive sound that can be used to detect and measure rain at sea. Heavy rain can increase noise levels by up to ...
     49  -4 2014 oct 02sense of soundDOSITS: Why is sound important to marine animals?Hearing is the universal alerting sense in all vertebrates. Sound is so important because animals are able to hear events all around them, no matter where their ...
     51  +12 2014 aug 05what is measurementDOSITS: How is hearing measured ?Hearing is an important sense for most animals. However, all animals do not hear all sounds. For example, humans can't hear the sound a dog whistle makes, ...
     52  -32 2014 aug 21pink river dolphinClick either choice below to hear the Amazon River Dolphin : ... It also goes by pink dolphin, bufeo, tonina, and delfin rosado. Boto can be found in 6 countries in  ...
     53  +48 2014 sep 29measuring wind speedDOSITS: How is sound used to measure wind over the ocean?Because the sound produced by breaking waves depends on wind speed , it can be used to measure winds over the ocean. An underwater view of waves ...
     53  +8 2014 sep 23speed of soundDOSITS: Speed of SoundSound travels about 1500 meters per second in seawater. Sound travels much more slowly in air, at about 340 meters per second. The speed of sound in ...
     53  +22 2014 sep 13sound of animalDOSITS: Why is sound important to marine animals ?
     53  -14 2014 aug 17measure wind speed
     54  +14 2014 sep 23sound pressureDOSITS: Introduction to Signal Levels - Discovery of Sound in the SeaThe two simplest ways of characterizing a sound wave are by its peak pressure and by its peak-to-peak pressure . The peak pressure , also called the 0-to-peak ...
     55  -5 2014 oct 01what is current measured inCurrents are commonly measured with sound. There are several different ways to measure currents with sound. An instrument called an Acoustic Doppler ...
     55  ~ 2014 sep 30sounds of animalsMost animals , including marine mammals and fishes, hear best at the frequencies they produce and have varying sensitivity to sounds of different frequencies.
     55  +2 2014 aug 17hump back whale
     57  -6 2014 sep 21surfzoneDOSITS: How is sound used to measure waves in the surf zone ?Understanding beaches and the surf zone is vital to coastal development and living wisely along the coast. About half of the U.S. population lives in coastal ...
     57  -4 2014 aug 22croaker fish photosDOSITS: Atlantic CroakerPhoto of Atlantic Croaker ... Click either choice below to hear the Atlantic Croaker : ... Whether in estuarine or offshore waters, croakers are bottom dwelling fish  ...
     57  +27 2014 jul 20diagram arus dataDOSITS: Archival Marine Acoustic Recording Units ( ARUs )Here, archival means that the data are collected and stored onboard the unit for analysis ... Diagram of a high frequency acoustic recording package (HARP).
     58  -14 2014 aug 07sound of waterFAQs - Discovery of Sound in the SeaSound in water and sound in air are both waves that move similarly and can be characterized the same way. Sound waves can travel through any substance, ...
     58  -15 2014 aug 07bottom of the oceanDOSITS: How is sound used to find objects on the ocean bottom ?Sonar is used to find objects on the bottom of the ocean . Side scan sonar is one method used to look at the detail of the ocean floor. Side scan sonar instruments  ...
     59  -35 2014 jul 27sea water depthDiscovery of Sound in the Sea ... Echosounders calculate water depth by measuring the time it takes for the acoustic signal to reach the bottom and the echo to ...
     60  -21 2014 sep 26bottlenose dolphinDOSITS: Bottlenose DolphinThese dolphins have short beaks called rostrums. Their bodies are gray or charcoal in color with a lighter underside. They can grow to about 3.9 m (13 ft) in  ...
     60  +1 2014 aug 27data logging systemsDOSITS: Acoustic Datalogging SystemsAcoustic Datalogging Systems . Mobile hydrophone surveys have been used to record fish sounds and locate spawning areas (see section on How do fish ...
     60  +3 2014 aug 17speed the soundDOSITS: How fast does sound travel?Colladon and Sturm measure the speed of sound in 1826. In 1826 on Lake Geneva, Switzerland, Jean-Daniel Colladon, a physicist, and Charles-Francois ...
     61  +16 2014 aug 19animal behavioral studiesDOSITS: Hearing Sensitivity StudiesIf an animal is unable to detect a sound due to limitations in hearing range or ... Behavioral studies are conducted to determine the softest sounds that an animal  ...
     62  -5 2014 aug 29science of asking questionsScience is a process for asking questions about the natural world and testing the answers. Scientists use the Scientific Method as the orderly process to ask  ...
     62  -7 2014 jul 29hearing range test
     63  -5 2014 jul 28humpback whale photoPhoto of humpback whale breaching. ... Underwater photograph of humpback whales in Hawaii. ... Click either choice below to hear the Humpback Whale : ...
     64  +30 2014 aug 31impact sound effectsDOSITS: Potential effects of sound on marine mammalsScientists suggest that increased background noise and specific sound sources might impact marine animals in several ways. The potential impacts include ...
     65  -5 2014 aug 02test hearing range
     67  +34 2014 sep 01different types of fishesDOSITS: How do fish produce sounds?Fishes produce different types of sounds using different mechanisms and for different reasons. Sounds (vocalizations) may be intentionally produced as signals ...
     67  +3 2014 aug 05human sound effectsHow does anthropogenic ( human -generated) sound affect marine animals? The ocean is full of both natural and anthropogenic sources of sound (see What are ...
     69  +32 2014 aug 30sonar sound nycReferences and Additional Resources - Discovery of Sound in the SeaGovernment Printing Office, Washington, D.C.; Bell, T. G. 1962, " Sonar and Submarine Detection. ... Acoustical Society of America, Melville, New York , 2004.
     69  -2 2014 aug 27sound animal repel soundDOSITS: How is sound used to protect marine mammals?AHDs emit a high frequency, intense noise intended to repel an animal from an area. Commercially available AHDs operate in a frequency range of 8-20 kHz ...
     69  +32 2014 jul 31surf and soundDOSITS: How is sound used to measure waves in the surf zone?Nearby beaches can have very different kinds of surf . For example, Black's Beach , near San Diego, is a world-renowned surfing spot with powerful waves, while ...
     70  -18 2014 sep 01volcanic activity and earthquakes
     71  +30 2014 aug 01noise level dbDOSITS: Ocean Noise Variability and Noise BudgetsMarine mammal calls can increase low-frequency underwater sound levels by 20 –25 underwater dB in some locations at certain times of year. The ambient ...
     74  ~ 2014 aug 19measure water pressureDOSITS: How is sound used to measure temperature in the ocean?The speed of sound in water depends on the water properties of temperature, salinity and pressure (directly related to the depth). A typical speed of sound in ...
     75  +26 2014 aug 18speed and sound
     75  -1 2014 aug 07underwater data loggerslow cost recording device which could be deployed underwater for extended time
     76  +5 2014 jul 24sailboat sound signals diagranDiagram courtesy of USGS Seafloor Mapping Technology group, ... The signals from the hydrophone are sent to the ship for processing and an image is made ...
     77  ~ 2014 oct 04coast average effektSmall coastal cetaceans, like the Vaquita and their northern relatives, the harbor ... Pinger signals may result in the “dinner bell" effect , where sound acts as an ... with fishermen landing an average of 13,000 metric tons of sablefish each year.
     77  -4 2014 sep 22variation of pressure with depthAlthough the variations in the speed of sound are not large, they have important effects ... water temperature, increasing salinity and increasing pressure ( depth ).
     78  -18 2014 aug 14hearing frequency testYou may have had a hearing test . The person being tested sits in a very quiet room with headphones. Sounds are played at different frequencies and intensities, ...
     80  +7 2014 jul 26my life asDOSITS: My Life as a RaindropMy life begins in a cloud. A cloud contains not only water, but also tiny particles such as dust, smoke and salt. These particles are called condensation nuclei.
     81  ~ 2014 sep 19temperature aroundThe speed of sound in water depends on the water properties of temperature , salinity and pressure (directly related to the depth). A typical speed of sound in  ...
     81  ~ 2014 sep 14layers of blue ocean hawaiiDOSITS: Acoustic Thermometry of Ocean Climate (ATOC)Sound waves normally bounce around between layers of the ocean but in the SOFAR
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