공통영어1 미래엔 김성연 3과 빈칸문제

Which is the ____ environment for studying: a noisy place or a quiet place?

Rarely do people ____ to put up with a lot of noise because it can be unpleasant and distracting.

Fortunately, scientists have invented ____ technology, which is now being used across various fields to reduce unwanted noise.

What is the ____ principle behind this achievement?

To understand this, let’s examine how sound ____.

Sound is produced through vibrations that occur from a sound source, when the strings of a ____ are played, for instance.

The vibrations of the sound source cause the air to vibrate and the ____ to travel as waves, similar to the ripples created in a lake when you throw a stone.

When these sound waves ____ our ears, the brain interprets them as sound.

Just as different ripples in water might overlap if you throw two stones, sound waves ____ also interfere with each other when they meet.

There are two types of ____: constructive and destructive.

Constructive interference occurs when the peaks of two waves ____, resulting in a bigger wave and a louder sound.

Destructive ____, on the other hand, occurs when a peak of one wave overlaps with a valley of another wave, so they cancel each other out and produce a quieter sound, or no sound at all.

Destructive interference is used in the noise-cancelling feature of headphones when we listen to ____.

____ the headphones are microphones and noise-cancelling circuitry.

The microphones ____ up sounds from the outside, and the circuitry analyzes them to produce opposite sound waves.

For example, if outside noise has a value of +1, the circuitry will generate an opposite noise of –1 and ____ it to the speakers.

This cancels out the unwanted sound ____ in noisy surroundings, so you can hear the music sound clearly without turning up the volume.

____, it is not easy to entirely eliminate external noise with this technology.

To achieve full noise ____, the circuitry must convert the noise into digital data and instantly transmit the opposite sound to the speakers as soon as the noise reaches the microphones.

Therefore, this noise-cancellation technology is effective for predictable sounds like those of car engines and subways that occur regularly or ____ a period of time.

However, it’s relatively less effective for inconsistent sounds ____ as those of people talking close to you.

Noise-cancelling technology is not only ____ in music devices.

Other fields also take advantage of this technology, such as ticket ____ at tourist attractions which are often very noisy.

Microphones are installed in ticket ____ to detect external noise, and an opposite sound wave is generated and transmitted through a speaker, enabling the ticket agent to hear the customer’s voice clearly.

Another area in which this technology is used is drive-through ____ restaurants and coffee shops.

They use noise-cancelling headsets to improve communication between employees and customers by eliminating vehicle ____.

____ noise-cancelling headsets help drive-through employees take orders accurately.

The ____ technology is also used for cars, whose audio systems generate waves to cancel out unpleasant sounds such as engine, wind, and road noise.

Thanks to noise-cancelling devices, it is possible for drivers to focus on driving without ____ disturbed by distracting noises.

As technology advances, many ____ expect it will solve various social issues caused by noise pollution.

A common ____ of these problems is noisy neighbors, as the noise they make can lead to conflict among residents.

Noise-cancellation technology can help address these problems by reducing unwanted disturbances, allowing people to ____ more peaceful and healthier lives.