Echolocation

The large, round, BLUE structure in the picture is the:

• Pan

• Melon

• Brain

• Nasal sac

 Which of the models below accurately shows the flow of acoustic energy for a dolphin that is able to detect a fishing net?

• melon→ nasal sacs→ fishing net→ jaw→ inner ear

• nasal sacs→ melon→ fishing net→ jaw→ inner ear

• jaw→ nasal sacs→ inner ear→ fishing net→ melon

• melon→ inner ear→ fishing net→ jaw→ nasal sacs

Examine the Graph below. Which organism listed hears at the highest sound frequency?

• swiftlets

• oilbirds

• one tongue clicking pteropodid bat

• one laryngeal echolocating bat

• humans.

Which best describes the process by which ultrasounds images are made?

• Low-frequency sound waves are generated by a machine and refracted off of objects, creating echoes that are processed into images.

• High-frequency sound waves are generated by a machine and refracted off of objects, creating echoes that are processed into images.

• High-frequency sound waves are generated by a machine and reflected off of objects, creating echoes that are processed into images.

• Low-frequency sound waves are generated by a machine and reflected off of objects, creating echoes that are processed into images.

An ultrasound tech is trying to identify an object, but the machine is broken and is not sending out the sound wave. Which statement best describes this situation?

• The generated sound wave will not be able to reflect off of the object.

• The sound wave will not be generated, so there will be no echoes received.

• The echoes will be made but will be unable to be received by the machine.

• The machine will not be able to process the received echoes into images.

Examine the Acoustic Ranges of Marine Mammals and the frequencies of various anthropogenic noises. Which of the following marine mammals would be the least affected by anthropogenic noise?

• Pinnipeds

• Odontocetes

• Mysticetes

Which of the following statements is accurate based on the data?

• Pinnipeds are the most affected by the anthropogenic noise

• Mysticetes are the most affected by anthropogenic noise

• Odontocetes are the most affected by anthropogenic noise

In which medium would echolocation sound waves travel the FASTEST?

• Vacuum

• Freshwater

• Air

• Salt Water

Which of the following wave lines in the graph represents the LOUDEST sound?

• Solid red line

• Solid blue line

• Dotted red line

• All 3 waves are equally loud