Whales utilize acoustic frequencies to communicate underwater. If the
whales are unable to communicate their bi-annual migration can become
perilous. Man-made low frequency sonarcan prevent whales from
producing soundand sometimes causes them to take alternate routes.
When the whales try to avoid the sonar they are in danger of running
ashore and perishing after being beached.
Twice a year, around the months of December and May, populations of
gray whales migrate from Mexico to Alaska. (Unknown1, 2002) During
this journey, they pass the state of California, where acoustical
pulses, generated by air guns or water guns, are used in seismic
surveys. If the seismic-generated sound waves exceed the "background"
noise or normal amount of noise, they could interfere with gray whale
communication or disturb behavior. (Unknown1, 2002) It is possible
that seismic surveys have a detrimental impact on marine life, such as
Whales are able to perceive sound in a wide range of frequencies from
75 Hz up to 150 Hz. In experimental conditions, where the
environment's level of noise is controlled, the whales are more
sensitive and hear from 10 Hz to 100 Hz. In addition, smaller whales
have a broader range from which they can hear from 10 up to 300Hz.
Whales depend on sound for communication, navigation, and even
detection of predators and prey. The seismic-generated sound waves may
disturb critical abilities. Disruption of any of their vital functions
can significantly disturb the fitness of whales. (Unknown3) There are
many factors that affect...
... middle of paper ...
Malme, C.L Miles, P.R., Miller, G.W., Richardson, W.J., Roseneau,
D.G., Thomson, K.H., and Green, C.R., (1989) Analysis and ranking of
acoustic disturbance potential of petroleum industry activities and
other sources of noise in the environment of marine mammals in Alaska.
BBN Report 6945, OCS Study MMS 98-0006, Report from BBN Systems &
Technological Corporation, Cambridge, MA, for US Minerals Management
Service, Anchorage, AK, NTIS PB90-188673.
Richardson, W.J., Greene, C.R., Malme, C.I. and Thomson D.H., (1995)
Marine Mammals and Noise. Academic Press
Simmonds, M.P. and Hutchinson, J.D. (1996) the Conservation of Whales
and Dolphins. John Wiley & Sons
Sinkin, L. (2001) "U.S. Navy's Low Frequency Active Sonar Research
Exposed." [Online] Available. http://www.whales.org.au/news/tyack.html
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- My Communications coursework will be on non-radio communications. My chosen topic is underwater acoustics. The applications of underwater acoustics and their advantages and disadvantages will be studied. All forms of non-radio communications are based on waves. Waves are generally a disturbance in a surface, transferring energy from A to B. Waves can be mechanical vibrations travel through a medium. For example: water, sound. These waves are called mechanical waves. Progressive waves are created from a point and energy is distributed to the surroundings.... [tags: Non-radio Communications]
2136 words (6.1 pages)
- UNDERWATER WIRELESS COMMUNICATION The communication between any two entities can be either wired or wireless. The concept of wireless technology was started in the year 1923. As we all know that 70% of the earth is full covered with water. It was necessary to develop wireless network that can also work under water. Here arises the concept of acoustic waves. Acoustic wave’s works better in water .Also it can travel long distance inside water and are very fast than radio waves. The concept of underwater wireless communication is a major finding in the field of wireless communications.... [tags: messages, oceanography, transmitting]
1100 words (3.1 pages)
- Sea World hardly has enough room in their tanks for one massive killer whale, so imagine them trying to squeeze in two so then they could share their social interactions with one another like so many orcas do in a pod together. These pods to the whales are very much like a family, “Orcas live in closely knit, highly complex social groups (pods) typically numbering five to twenty-five members. The Members are related by blood and remain together for life. They hunt play, socialize, and rest as a cohesive group.... [tags: Whale, Killer whale, Killer whales, Beached whale]
1524 words (4.4 pages)
- What is it like to breathe underwater. Have you seen the underwater footage of divers, maybe filming sea life, and wondered what it might be like or how it would feel, to breather underwater. Well, I have, and I did. But of course it took some study and practice, drills as they were referred to. I remember the first day in the pool, we are gathered around along the wall of the pool and asked to swim across the length of the pool, were told to hold our breath underwater as long as we can. Our instructor is sizing up our strengths, and weaknesses.... [tags: Scuba diving, Underwater diving, Diving equipment]
986 words (2.8 pages)
- The concert hall is one of man's greatest joys; enjoying a fine symphony composed by the worlds greatest, performed by a world class orchestra. For months afterwards, the borgoise attendees will speak of the energy of the conductor, the orchestra responding to him, the power of it all. The crescendoes, the diminuendos, the stark silences between movements, the clarity of the soloist above the rest of the orchestra. Little do they know that were it not for the meticulous consideration of the architect at construction time, the patrons would not feel that they were getting their money's 'worth.' The architect is tapping into the world of acoustics; in this case, achieving the best possible so... [tags: acoustic acoustics sound]
2781 words (7.9 pages)
- “… building a tank the size of Rhode Island wouldn’t be large enough for a six-ton male killer whale such as Tilikum, an animal capable of swimming 100 miles a day,” states an anonymous whale expert. Whales have been in captivity since 1861 when P.T. Barnum displayed the first live whale that was captured in Canada. However, Barnum had no idea how to care for the mammal and it died after only a week in captivity. (Animal Legal and Historical Center, 2014) Being up close with killer whales could give us some clues about how they interact with each other, including physical behavior, their dialect, and how their pods work together as a family unit.... [tags: Killer Whales, Captivity, Ocean, Rhode Island]
911 words (2.6 pages)
- Currently, live whale performances have become well liked for tourists to visit. When they are there, they only see what they want to see and do not care or want to know all about the complications the whales go through just to make people smile. The documentary “Blackfish” exposes the truth about the whales, their habits, and why they act the manner they do when in captivity. The inhumane treatment of whales in captivity causes negative effects on the animals which, in turn, affects the humans who care for them.... [tags: Whale, Killer whale, Beached whale, Killer whales]
1153 words (3.3 pages)
- Though often seen as fierce killing machines, Orca whales, more commonly known as killer whales, are much different. In some ways, these mysterious creatures are much like humans. Many people are fascinated by these whales when they see them perform in marine parks such as SeaWorld. What most people don’t realize is that the life of these whales is not as great as it may seem. There is much evidence that proves captive life will never be adequate. There is no doubt that life in captivity is no match for life in the wild.... [tags: Orca Whales, Sea Animals, Marine Parks]
991 words (2.8 pages)
- Acoustics in Music Through out the history of music, acoustics have played a major role. After all if it were not for acoustics the quality of sound that we know today would not exist. The word acoustics comes from the Greek word akouein, which means, “to hear”(Encarta Encyclopedia). Since music has to be heard in most cases for enjoyment, acoustics obviously take on a very important role in the pleasure that music brings to the ear. Acoustical architecture and design are two key elements in the way music sounds.... [tags: Papers]
508 words (1.5 pages)
- A flute blows a rapid jet of air across the embouchure hole. The pressure inside the players mouth is above atmospheric (usually 1kpa: just enough to support a 10cm height difference in a water manometer). (http://newt.phys.unsw.edu.au/music/) The work done to accelerate the air in this jet is the source of power input to instrument. Sound requires an oscillating motion or air flow. In the flute, the air jet, and the resonance in the air in instrument produces an oscillating component of the flow.... [tags: acoustic sound]
553 words (1.6 pages)