placeholder image to represent content

A Room-Sized Computer in Your Digital Music Player

Quiz by Nicole Garcia

Feel free to use or edit a copy

includes Teacher and Student dashboards

Measure skills
from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can
  • edit the questions
  • save a copy for later
  • start a class game
  • view complete results in the Gradebook and Mastery Dashboards
  • automatically assign follow-up activities based on students’ scores
  • assign as homework
  • share a link with colleagues
  • print as a bubble sheet

Our brand new solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

New Quizalize solo game modes
7 questions
Show answers
  • Q1
    According to the text, what did the disaster at Pearl Harbor show that the U.S. military leaders needed?
    a secure system for recording and playing music
    a way to improve the speed of the telegraph code
    a way to prepare military bases' defenses more quickly
    a secure system for communication with their troops
  • Q2
    In this text, the author describes a sequence of technological development. In what order were these technologies created?
    the Vocodor, SIGSALY, CDs, MP3 music files
    CDs, MP3 music files, the Vocoder, SIGSALY
    MP3 music files, SIGSALY, CDs, the Vocoder
    SIGSALY, the Vocoder, CDs, MP3 music files
  • Q3
    The method used by SIGSALY to encode messages was more effective than the method used by the Scrambler to encode messages, What evidence from the text best supports this conclusion?
    Marshall didn't trust the Scrambler for his secure military communications, so he decided to send his message to Hawaii via telegraph
    The SIGSALY system saw the first transmission of speech using pulse-code modulation and the first effective use of bandwidth compression to recreate speech.
    The Germans were able to crack the code for the Scrambler, while no record has ever been found of the German or Japanese militaries decoding SIGSALY's messages.
    More than 3,000 high-level conversations happened over SIGSALY, covering troop movements, equipment drops, and military strategy.
  • Q4
    Which machine had the most direct impact on the way music is recorded and played?
    the telegraph
    the Vocoder
    the Scrambler
  • Q5
    What is the main idea of the text?
    A voice encoding system made for military use was the bases for some of today's digital music systems.
    SIGSALY was the first digital voice encoding system, and it used a process called pulse-code modulation to encode human speech.
    While CDs and MP3s both used pulse-code modulation to record and play music, they have very different physical forms.
    Thousands of people were killed at Pearl Harbor due to the failure of the U.S. Military's secure communications sustem.
  • Q6
    Read these sentences about the Vocoder, a voice encoding machine. The disaster at Pearl harbor confirmed what Marshall and other military leaders already knew: they needed a secure system for communication with their troops, one that could not be cracked by enemy forces. They turned to a company called Bell Labs, which in the 1920s had developed the Vocoder, an early voice encoding machine which took analog recordings, capturing the sounds as they were naturally emitted. The Vocoder recorded people's voices and divided them by frequency into different pieces. It sent those pieces separately via radio waves to a machine on he other end, which received the different pieces and spliced them together to recreate the original sound. Based on these sentences, what does "encoding" mean?
    deleting a message so that no one can access it aside from the recipient
    recording a message so that it is perfectly preserved and understandable
    changing a message in some way so that it cannot be understood
    adjusting the volume of a message so that it can be heard more clearly
  • Q7
    Choose the answer that best completes the sentence. The Vocoder was an analog voice encoding machine, ___________ SIGSALY was a digital system.
    even though

Teachers give this quiz to your class