Scientists use microphones and oscilloscopes to detect and analyze the sounds that animals produce. By looking at the sound wave traces on the oscilloscope screen, scientists can determine the intensity and pitch of the sounds. Dolphins and whales have highly developed hearing abilities that allow them to communicate and echolocate underwater, as their hearing ranges far beyond the capabilities of human ears. Dogs have a strong sense of hearing that helps them locate the source of sounds in their environment.

1. Human hearing. What are sound waves? Scientists use microphones to detect animal sounds. If a microphone is attached to an oscilloscope, you can see a representation of sound wave that the animal produces. By looking at the wave (or trace) on the oscilloscope screen, scientists can work out the intensity an pitch of the sound. J G.

2. Dolphin/Whale hearing range. What is a dolphin or whales hearing range? Animals use sounds to communicate, to warn other animals of danger, to try and stop others entering their territory, to win a mate, or to hunt. Dolphins and whales have voices, but it's a lot different from most other mammals. The limited visibility under water made sounds and hearing very important for them. The sounds of the whales are not produced with their mouth/beak but only inside their blow-hole. They also use frequencies that reach far beyond our hearing capabilities. Of course they can also hear these higher frequencies. Y C.

3. Animal hearing ! Animals can communicate with each other , tow warn them of the type of animals , to become mates and hunt with them . Some animals use sound to see what they are looking for . Bats wear hoods that cover there ears . E