Oscillator & Oscilloscope, Hearing Includes Lab 1 and Lab 3.

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Presentation transcript:

Oscillator & Oscilloscope, Hearing Includes Lab 1 and Lab 3

All student-centered activities Learn about basic devices Required – be able to read the signal properties on the oscilloscope screen After experiment #3 of Lab 1, you can proceed to any experiments in any order Love music? How about Lab 3?

Lab 1: Oscillators & Oscilloscopes The Oscillator 1.Using the Oscillator The Oscilloscope 2.Using the Oscilloscope 3.Measuring Amplitude & Period 4.Pitch and Loudness 5.Wave Shape 6.Interesting Things to Do 7.Lissajous Figures (Optional)

Lab 3: Hearing 1.Loudness & Pitch 2.Frequency Range of Hearing 3.Loudness & Amplitude 4.Pitch Discrimination 5.Beats 6.Difference Tones 7.Loudness Affects Pitch Perception 8.Masking 9.More on Loudness

Sine Wave – Periodic Wave equilibrium A T T Amplitude ( A ): Maximal distance from the equilibrium Period ( T ): Time it takes to complete one oscillation Frequency ( f ): Number of complete oscillations in one second (= 1/T )

Oscillator & f counter HI LO f A TTL Oscillator (V, f ): Generates electrical signal A A TTL, f Frequency counter: Measures f of electrical signal Speaker / Headphone A HI, f Oscilloscope CH 1 A LO, f

Oscilloscope CH 1 Oscilloscope: Displays and measures electrical signal Learn how to read and measure displayed trace! Remember: You will not know T and A until you actually measure them.

Connection between the perception and physical stimuli is an important topic in this course.

Notes to Students Hearing Damage –Could occur by a large output amplitude from function generator. Data and Observation –Record numbers and observations directly as they appear on devices Test Individually –Test of frequency range of hearing is designed to be done individually