Websites to Visit:
Searching on Google Tips:
http://www.safesearchkids.com/google/#.VsYIEvkrK1s
https://www.googlejunior.com/
- Watch your spelling
- Use keywords, such as: hearing. senses, ear, sound
http://www.safesearchkids.com/google/#.VsYIEvkrK1s
https://www.googlejunior.com/
http://faculty.washington.edu/chudler/amaze.html - Animal Senses
http://largestfastestsmartest.co.uk/animals-with-the-best-sense-of-hearing-in-the-world/ - Best Sense of Hearing
http://www.guinnessworldrecords.com/world-records/highest-frequency-hearing-animal - Highest Frequency
http://kids.nationalgeographic.com/animals/ - Search for your animals interesting facts!
Hedgehog - http://animals.mom.me/hedgehog-good-hearing-eyesight-11380.html
http://www.slideshare.net/mswilsonri/hedehogs
Inside the Animal Ear Diagram:
Snake Ear (Below)
Bat Ear (Below)
Animal Hearing and Sound Video
Facts from BGRS Website
Hearing Frequency Charts
Dolphins
Do dolphins have ears and how well can they hear?
Dolphins have very good directional hearing. In fact, hearing is their most highly-developed sense. Because they spend most of their time underwater, their hearing system is very different to that of ours and other land mammals. Instead of having external ears, sound waves in the water are transmitted via the dolphins skull to the inner ear region.
Dolphins have very good directional hearing. In fact, hearing is their most highly-developed sense. Because they spend most of their time underwater, their hearing system is very different to that of ours and other land mammals. Instead of having external ears, sound waves in the water are transmitted via the dolphins skull to the inner ear region.
Dolphins Use Sonar to Make Sounds
- Dolphins love to make noise both under water and above water. Dolphins use their sonar capabilities to produce sound under water. These sounds serve a very important purpose because they help the dolphin to hunt, navigate and study their environment. Researchers have found that the sounds that are created under water actually come from the dolphin's brain first, but there are only theories and speculation as to what happens next. According to the Dolphin Research Center (see Resources below), there are two theories about how dolphins actually create sound under water. The first theory is that the dolphin's air sacs actually work as an "acoustical mirror" and that the sound is produced from tiny portions of fatty tissue right under the blowhole. As air moves past these tissues, it can create pressure that transmits a pulse into the ocean.
- The other theory is that the dolphins use their nasal sacs to make sounds under water. These little sacs are found under the blowhole. When the dolphins go to the surface to take a breath, they pull the air in and close their blowhole. This air inhaled by the dolphins will fill up the sacs and cause pressure to create sound. Dolphins have also been seen to produce sound under water in order to kill other fish and marine life. This clearly shows that dolphins use sound to hunt. Dolphins also use their sonar to communicate with each other, and they can even talk to other dolphins that are not of the same species. Dolphins are believed to be very intelligent creatures of the ocean.
- Sounds are produced by dolphins when they are out of the water as well. Dolphins can do this by pushing air directly through their blowholes. They use the muscles inside the lining of their air hole to force air out of the blow hole. The dolphins can also make noise in response to what they see going on above water. For instance, if a dolphin is excited when a little girl pets him, the dolphin can open its mouth to squeak with delight. This other sound is produced by vocal cords inside the dolphin's throat. Dolphins need to come up to
How do dolphins hear?
Dolphins hear through a sophisticated hearing sense which is located in small ear openings on both sides of the head.
However, it is believed that hearing underwater is mainly done through the lower jar bone which conducts sounds to the middle ear.
Dolphins are able to hear a broader range of frequencies than humans.
While we can hear sounds from 20 Hz to 20 Khz, dolphins are able to hear from 20 to 150 Khz being up to 7 times more sensitive than human ear.
Therefore we are not even able to hear a large number of sound made by dolphins.
edit.
Dolphins hear through a sophisticated hearing sense which is located in small ear openings on both sides of the head.
However, it is believed that hearing underwater is mainly done through the lower jar bone which conducts sounds to the middle ear.
Dolphins are able to hear a broader range of frequencies than humans.
While we can hear sounds from 20 Hz to 20 Khz, dolphins are able to hear from 20 to 150 Khz being up to 7 times more sensitive than human ear.
Therefore we are not even able to hear a large number of sound made by dolphins.
edit.