Chapter 3: Digital Instruments

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VAB 
ID #

VAB TITLE

Type of VAB

Description of VAB

Lab Requirements

3.1

Hearing Frequency Range

Explore

Students measure the frequency range of their hearing.

Do your cilia still sway? Email your data (age in years, months, frequency range (state if different in either ear) to Mr. R.

3.2

3.2 Guitar String Model

Explore & Annotate

Simulate a guitar string using a digital physical model.

How do the blocks physically model the acoustics of a real vibrating string? Be able to tell me what each section of this sheet is doing to help physically model the guitar string. Be able to hear and see how the envelopes differ for these instruments on the lab portion of a test.

3.3

Digital Echo Generator

Explore

Process your voice using digital echo.

Process music with digital echo.

Process your voice and music using the digital recursive echo generator.

Hear the recursive delays create echo's. Be able to explain how echoes are created digitally.

3.4

Digital Flanger

Explore

Process your voice and music using the digital flanger. 

What happens to the sound of your voice? To the sound of music?
3.4A Voice Changer

Design & Build Create a worksheet that duplicates the functions of a toy bullhorn with voice effects. Choose to modulate a voice to become either robot-like, Darth Vader-like, or  chipmunk-like. You may use any of the VAB blocks and trick's you've picked up on so far. "A+" grades will be given to any worksheet capable of generating more than one sound effect by using switches and buttons. Email completed sheets to Mr. R
 

3.5

Testing of the Gosney Speaker

D&B

Students test the speaker they have constructed.

Grade will be based on:
1) Frequency range (lowest to highest)
2) Amplitude of sound at around 400 Hertz
3) Quality of construction
4) Innovation beyond the given Gosney template
5) Ability to function as a microphone
IOngineering @ St. Mark's School of Texas
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