Hearing Our auditory sense. We hear sound WAVES The height of the wave gives us the amplitude of the sound (loudness). Amplitude is measured in Decibels.

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Presentation transcript:

Hearing Our auditory sense

We hear sound WAVES The height of the wave gives us the amplitude of the sound (loudness). Amplitude is measured in Decibels. The frequency of the wave gives us the pitch if the sound. Frequency is measured in Hertz (Hz) Purity (wrinkles in the wave)= timbre

The Ear

Transduction in the ear Sound waves hit the eardrum then anvil then hammer then stirrup then oval window. Everything is just vibrating. Then the cochlea vibrates. The cochlea is lined with mucus called basilar membrane. In basilar membrane there are hair cells. When hair cells vibrate they turn vibrations into neural impulses which are called organ of Corti. Sent then to thalamus up auditory nerve. It is all about the vibrations!!!

Vestibular Sense Tells us where our body is oriented in space. Our sense of balance. Located in our semicircular canals in our ears.

Pitch Theories Place Theory and Frequency Theory

Place Theory Different hairs vibrate in the cochlea for different pitches. So some hairs vibrate when they hear high and other vibrate when they hear low pitches. Harp Analogy

Frequency Theory All the hairs vibrate but at different speeds. Drum analogy Both theories correct. Low Frequency= frequency coding High Frequency = Place coding

Deafness Conduction Deafness Something goes wrong with the sound and the vibration on the way to the cochlea. You can replace the bones or get a hearing aid to help. Nerve (sensorineural) Deafness The hair cells in the cochlea get damaged. Loud noises can cause this type of deafness. NO WAY to replace the hairs. Cochlea implant is possible.

Touch 6 specialized receptors in our skin (pressure, warmth, cold, pain). 2 Pathways: Fast and Slow Pain is a subjective experience Gate Control Theory of Pain

Taste: Gustatory We have bumps on our tongue called papillae. Taste buds are located on the papillae (all over the tounge). Taste cells- replaced every 10 days

Taste:Gustatory Sweet, salty, sour and bitter. Innate preferences Social Influences Genetic Influences: Non Tasters v. Super Tasters PTC Strips

Smell: Olfactory

Kinesthetic Sense Tells us where our body parts are. Receptors located in our muscles and joints.