This passage suggests that a good auditorium should_____A.get rid of all reflections.B.not have absorbers.C.achieve a pleasing mixture of sound.D.have smooth surfaces.
This passage suggests that a good auditorium should_____
A.get rid of all reflections.
B.not have absorbers.
C.achieve a pleasing mixture of sound.
D.have smooth surfaces.
B.not have absorbers.
C.achieve a pleasing mixture of sound.
D.have smooth surfaces.
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Can you hear This? When something creates a sound wave in a room or an auditorium, listeners hear the sound wave directly from the source. They also hear the reflections as the sound bounces off the walls, floor, and ceiling. These are called the reflected wave or reverberant(反射的)sound, which can be heard even after the sound is no longer coming from the source. The reverberation time of an auditorium is determined by the volume or interior size of the auditorium. It is also determined by how well or how poorly the walls, ceiling, floor, and contents of the room (including the people) absorb sound. There is no ideal reverberation time. Because each use of an auditorium calls for different reverberation. Speech needs to be understood clearly: therefore rooms used for talking must have a short reverberation time. The full-sound performance of music such as Wagner operas or Mahler symphonies should have a long reverberation time. The light, rapid musical passages of Bach or Mozart need a reverberation time somewhere between. Acoustic problems often are caused by poor auditorium design. Smooth, curved reflecting surfaces create large reflections. Parallel(平行的)walls reflect sound back and forth, creating a rapid, repetitive pulsing effect. Large pillars(柱)and corners can cause acoustic shadows as the sound waves try to pass around the object. Some of these problems can be solved by using absorbers and reflectors to change the reverberation time of a room. For example, hanging large reflectors, called clouds, over the performers will allow some sound frequencies to reflect and others to pass to achieve a pleasing mixture of sound.文章(41~45)This passage is mainly about_____A.sound waves and their effects.B.the types of music orchestras play.C.walls of an auditorium.D.the design of an auditorium.
This passage suggests that a good auditorium should_____A.get rid of all reflections.B.not have absorbers.C.achieve a pleasing mixture of sound.D.have smooth surfaces.
Questions 19~22 refer to the following memoGlenford Manufacturing, Inc.Official CommunicationFrom: Sean Carmichael, Operations DepartmentTo:Inna Tucker, Sales Department ManagerThe monthly sales staff meeting has been relocated from auditorium 3 to room 402. Auditorium 3 will be undergoing repairs from April 8-15, which is why it will be unavailable for your usual meeting on the 10th.Room 402 contains the same audiovisual capabilities as auditorium 3, but its seating capacity is smaller. It can only fit 65 people comfortably, whereas the auditorium can do over 100.If this change is unacceptable, there are two alternatives. First, auditorium 2 is available on the afternoon of the 10th. It holds as many people as auditorium 3, but it has really outdated electronic equipment compared to auditorium 3. And second, if the meeting is rescheduled for after the 15th, the newly refurbished auditorium 3 will be available to you.Please contact me or another member of the operations department if you wish to change your current room reservation.Thank you and have a nice day.The word "holds" in paragraph 3, line 2 is closest in meaning to ______.A.possesses B.conductsC.encloses D.accommodates
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大学生利用课余时间打工 the future of press Can you hear This? When something creates a sound wave in a room or an auditorium, listeners hear the sound wave directly from the source. They also hear the reflections as the sound bounces off the walls, floor, and ceiling. These are called the reflected wave or reverberant(反射的)sound, which can be heard even after the sound is no longer coming from the source. The reverberation time of an auditorium is determined by the volume or interior size of the auditorium. It is also determined by how well or how poorly the walls, ceiling, floor, and contents of the room (including the people) absorb sound. There is no ideal reverberation time. Because each use of an auditorium calls for different reverberation. Speech needs to be understood clearly: therefore rooms used for talking must have a short reverberation time. The full-sound performance of music such as Wagner operas or Mahler symphonies should have a long reverberation time. The light, rapid musical passages of Bach or Mozart need a reverberation time somewhere between. Acoustic problems often are caused by poor auditorium design. Smooth, curved reflecting surfaces create large reflections. Parallel(平行的)walls reflect sound back and forth, creating a rapid, repetitive pulsing effect. Large pillars(柱)and corners can cause acoustic shadows as the sound waves try to pass around the object. Some of these problems can be solved by using absorbers and reflectors to change the reverberation time of a room. For example, hanging large reflectors, called clouds, over the performers will allow some sound frequencies to reflect and others to pass to achieve a pleasing mixture of sound.文章(1~5)This passage is mainly about_____ A.sound waves and their effects.B.the types of music orchestras play.C.walls of an auditorium.D.the design of an auditorium.
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