Read the article below and decide which answer best fits each space. Đọc đoạn văn dưới và chọn từ thích hợp cho mỗi chỗ trống.

A Modern Record-Player System

A lot of people like to play their records as loudly as possible. The ___(1)___ is that the rest of the family and the neighbours often complain ___(2)___ they don't like the music. One ___(3)___ to this problem is to wear headphones, but headphones are usually uncomfortable. An armchair which has a record-player system built into it has just been ___(4)___ by a British engineer, Stephen Court. The armchair looks like an ordinary armchair with a high back. However, each of the two sides of the chair has three loudspeakers inside to reproduce middle and high sounds. Low sounds are reproduced by a pair of loudspeakers in a hollow ___(5)___ under the seat. Anyone who sits in the chair hears sounds coming from all round his / her head. Because we cannot tell the exact ___(6)___ from which low sounds come, it doesn't ___(7)___ that they come from underneath or behind. It is the higher sounds coming from the side of the chair that create a stereo effect. These sounds travel only a few inches to reach the listener's ears. ___(8)___, it takes only a little power to make the music sound very loud. Only a small amount of sound leaks out from behind the chair into the room to ___(9)___ others. Most of the sound is ___(10)___ by the listener.