What Is Sound? Quiz-2

Compression refers to a region of high air pressure in a sound wave. In a sound wave, compression occurs when the air particles are pushed close together, resulting in an area of increased pressure. This is followed by rarefaction, where the air particles spread out and the pressure decreases. Therefore, compression is the correct term for a region of high air pressure in a sound wave.

The term "medium" refers to the substance through which sound travels. In the context of sound waves, a medium is necessary for the transmission of sound energy. It can be a solid, liquid, or gas, and sound waves propagate by causing particles in the medium to vibrate. In this case, "space," "ether," and "vacuum" do not accurately describe the substance through which sound travels, making them incorrect options.

Timbre refers to the characteristic quality of sound produced by a particular voice or instrument. It is also known as tone color. Timbre distinguishes different voices or instruments, even when they are playing the same pitch at the same volume. It is what allows us to differentiate between a piano and a guitar, or between a soprano and a baritone. Timbre is influenced by factors such as the shape and size of the instrument or vocal cords, as well as the way sound is produced.

Rarefaction is the term used to describe a region of low air pressure in a sound wave. In a sound wave, rarefaction occurs when the particles of the medium are spread apart, resulting in a decrease in air pressure. This is in contrast to compression, which refers to a region of high air pressure where the particles of the medium are pushed closer together. Intonation and dissonance are unrelated terms that do not pertain to regions of low air pressure in sound waves.

Propagation refers to the process of sound waves traveling from one location to another. It involves the transfer of energy through a medium, such as air or water, causing the sound waves to propagate or spread out. This is different from evacuation, which refers to the act of leaving or emptying a place, isolation, which refers to being separated or secluded, and refraction, which refers to the bending of waves when they pass through different mediums. Therefore, the correct answer is propagation.

This is the reason why no one can hear you scream in Space!

Resonance refers to the phenomenon of an object or system vibrating at its natural frequency. When an external force is applied to the object or system at the same frequency as its natural frequency, it causes the object or system to vibrate with greater amplitude. This can occur in various contexts, such as musical instruments, sound waves, or even mechanical systems. Therefore, resonance is the correct term for something that continues to vibrate at a specific frequency.

Reception refers to the act of hearing and interpreting sound waves. It involves the process of receiving sound waves through the ears and then processing and understanding them in the brain. This term accurately describes the action of perceiving and understanding sound, making it the correct answer.

The word "buzzing" best describes the way a sound is generated on a trumpet. When playing a trumpet, the musician creates sound by buzzing their lips into the mouthpiece, which causes the air to vibrate and produce a distinct buzzing sound. This buzzing sound is then amplified and shaped by the trumpet's tubing to create different notes and tones.

Generation refers to the act of creating or producing something. In the context of the question, it specifically refers to the act of creating a vibration which is the source of a sound wave. This explanation fits with the definition of generation and accurately describes the process of creating a sound wave through vibration.