6-9 Assessment

1) Lab

Download the following document and complete the lab:

File:Musical Instruments Lab.pdf

    You will need the following materials:
    - Several musical instruments
    - Tuning fork
    - Computer
    - Logger Pro
    - Microphone

Taken from:

2) Journal

Now that we have completed our sixth unit we are to reflect on what we have learned. Please go to the discussion area and answer the following questions. Your answer should be approximately 100-200 words. Also, please read through some of the other journal posts and comment on any areas where you are able to add new insight.

   Journal Questions:
   1- What instruments use a stretched string? Air column? Stretched membrane?
   2- How can the structure of an instrument change the sound produced in stretched strings? Pipes? Stretched membranes?
   3- Are there any areas which are confusing you?  If so, what in particular?
   4- What do you look forward to learning more about?
   5- How do you plan on using this information in your musical career?

Talk: Journal Unit 6 Musical Instruments

3) Practice Questions for Unit 6:

1. When a string is plucked with a sharp object near its midpoint:

(a) all the even harmonics will be significantly depressed

(b) all the odd harmonics will be significantly depressed

(c) only the fundamental frequency will be heard

(d) none of the above

6-9: 1 SEE ANSWER

2. When producing an edge tone, the frequency of the tone produced is proprotional to the velocity of the jet-steam velocity.

(a) True

(b) False

6-9: 2 SEE ANSWER

3. The sound of a musical instrument is not just determined by the vibrating element, but by the resonant structure of the instrument.

(a) True

(b) False

6-9: 3 SEE ANSWER

4. A string is plucked at the midpoint. What is the intensity of the ninth harmonic relative to the fundamental?

6-9: 4 SEE ANSWER

5. The figure below shows the initial shape of a plucked string. Which harmonics would be absent from the complex vibrations?

6-9: 5 SEE ANSWER

6. Using physic terms, why is the harmonic content of a bowed string different from that of a plucked string?

6-9: 6 SEE ANSWER

7. There is a feedback between the reed motion and the air column to which it is attached. Describe this feedback system.

6-9: 7 SEE ANSWER

Continue: #REDIRECT 7-1 Objective

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