Question

Read the passage and answer the following question(s).



Analog and Digital Signals



Waves transmit energy from one place to another, including sound energy. The wave's amplitude is the wave's height from the line of equilibrium to the crest or trough. It is directly proportional to the energy of the wave. The wave amplitude is related to the sound quality of loudness. The loudness can be affected by how the wave interacts with various media types. The image shows the parts of a wave.



image.png



The characteristics of the surrounding medium affect the amplitude of a wave. Waves can be reflected from some material's surfaces, absorbed into the material, or transmitted through the material. Each of these three interactions causes the wave amplitude to become weaker.



We use waves to transmit information across space. Analog and digital signals are two methods for encoding information. Analog signals are associated with the sound we hear through the air and consist of a continuous wave of varying amplitudes. Digital signals represent data in discrete values of 0s and 1s and are boxed waves of limited amplitude. The differences in the amplitudes between the two signals are shown.



image.png



The table shows the characteristics, advantages, disadvantages, and examples of analog and digital signals.



image.png





Which TWO describe digital signal waves?


waves with a larger range of amplitudes


waves represented by a series of numbers


waves that require less encoding and decoding


waves that securely transmit information over long distances


waves that make up most of the sound found in the natural world

Answer 1

- waves represented by a series of numbers
- waves that securely transmit information over long distances

Digital signals use discrete numeric values (0s and 1s) and are better at preserving/securely transmitting data over long distances than analog waves.