3-8 Assessment

1) Lab

Download the following document and complete the lab:

    You will need the following materials:
    - Sound Level Meter
    - Musical Instrument (Woodwind or Brass)
    - Megaphone/ Speaking Trumpet (can make with poster board)

    Also, you will need to know the definitions for the following terms:
    - Sound Wave
    - Decibel
    - Sound Pressure Level
    - Amplitude
    - Musical Dynamics: Piano, Forte, Mezzo-Piano, Mezzo-Forte, Pianissimo, & Fortissimo

Taken from: <http://www.education.com/science-fair/article/air-pressure-perceived-loudness/</ref>

2) Journal

Now that we have completed our third 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- Are humans capable of "hearing" pitches that aren't actually produced by a sound source?  Why?
  2- Can you explain the difference between a combination tone and a missing fundamental? 
  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 3 Production of Complex Tones

3) Practice Questions for Unit 3:

1. Two tones which differ slightly in frequency when sounded simultaneously will produce

(a) aural harmonies

(b) standing wave

(c) beats

(d) none of the above

3-8: 1 SEE ANSWER

2. The human ear responds equally to all frequencies between 20 Hz and 20,000 Hz.

(a) True

(b) False

3-8: 2 SEE ANSWER

3. An oboe is playing a 440 A. A second oboe plays the same note and six beats are heard each second. If we assume the first instrument's tone has a frequency exactly equal to 440 Hz.

(a) What is the frequency of the second oboe?

(b) Is the second oboe sharp or flat with respect to the first oboe?

3-8: 3 SEE ANSWER

4. Two pure tones having frequencies of 440 Hz and 587 Hz are played together loudly. What are the frequencies of the combination tones most likely to be perceived?

3-8: 4 SEE ANSWER

Continue: #REDIRECT 4-1 Objective

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