SENSATION AND PERCEPTION
HEARING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A cat scratching a scratching post and hearing the noise it makes
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A dog hearing a sound and lifting its ear to that direction
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A squirrel dropping a peanut and being able to pick it up
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None of the above
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Detailed explanation-1: -Many animals (like some dogs) use ear movement to help determine where a sound is originating from. An example of sound localization is when you are driving and hear an ambulance siren. You want to determine if it is coming near you so you can stop your vehicle if it needs to pass you.
Detailed explanation-2: -The brain works out sound direction by comparing the times of when sound reaches the left versus the right ear. This cue is known as interaural time difference, or ITD for short.
Detailed explanation-3: -While dogs can perceive higher frequencies than we can, there’s one thing that we have that they don’t: directional hearing, or the ability to perceive the location of a sound.
Detailed explanation-4: -As the sound travels between ears through the animal’s body, each eardrum is activated by different sounds at its outer and inner surface that help the animal determine the source of the sound. For example, the ear facing more toward the sound source vibrates with a larger amplitude than the eardrum facing away.
Detailed explanation-5: -In psychology, sound localization is defined as the ability of an organism to discover the location of something producing sound waves based on things like intensity and timing. This ability is important to any animal as it can help hunters find their prey and allows prey to know where a potential killer is located.