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hearing threshold

题目
名词解释题
hearing threshold
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相似问题和答案

第1题：

同频A5实际的门限参数是()

A.threshold2a

B.threshold2

C.threshold3a

D.threshold3


参考答案：C, D

第2题：

感觉阈限（sensation threshold）


正确答案:是指刺激感受器信息的强度或强度的变化需要达到起码的量值，使机体感觉刺激的存在，而此时的临界值称为感觉阈值。感觉阈值有绝对阈值和差别阈值两类。

第3题：

［A］ audio ［B］ aural ［C］ hearing ［D］ listening


正确答案：C

 本题考查考生对固定搭配的掌握程度。由上下文语义可知，该处意为：一位母亲认为她女儿有严重的听力问题。表达这个含义的固定搭配是hearing problem。［A］项audio“音频的，声频的”，如audio and video equipment（视听设备）；［B］项aural “听觉的”，a musical with plenty of visual and aural appeal (一出颇娱人耳目的音乐喜剧)；［D］项listening“收听的，注意的”。

第4题：

经济阈值（economic threshold）


正确答案: 指应该采取防治措施时的发病数量，此时防治可防止发病数量超过允许的经济损害水平（economic injury level），防治费用不高于因病害减轻所获得的收益。损失预测结果可用以确定发病数量是否已经接近或达到经济阈值。

第5题：

sensorineural hearing loss


正确答案: 即感音神经性聋，螺旋器毛细胞、听神经、听传导径路或各级神经元受损害，致声音的感受与神经冲动传递障碍者，称感音性或神经性聋。临床上常规测听法未能将两者区分时可混称感音神经性聋。

第6题：

共用题干
Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.
The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.
It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.
Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".
The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk.

MP3 player can't damage hearing when one listens to MP3 music for only 60 minutes.
A:Right
B:Wrong
C: Not mentioned

答案：B
解析：
通过MP3播放器听60分钟的音乐不会损伤人的听力。根据是第一段第一句：Just one hour's listening to an MP3 player can damage hearing, claim scientists．科学家说，听 MP3哪怕只是短短一小时也有可能会损害听力。因此该句话是错误的。
这项新研究的研究结果和早前医生对于戴着耳机调高音量听MP3的危险的警告不谋而合。根据是第三段第一句：It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing．在此之前有医生警告说戴耳机听MP3时音量开得太高会导致耳聋。因此该句话是正确的。
对照组指的是短时间听MP3的人。根据是第三段最后一句：A second group of 28 men and women were a control group who were not exposed to MP3 music．另外一组中的28名男女作为对照组则没有听MP3播放的音乐。因此该句话是错误的。
根据听MP3之后的听力测试，对照组和收听组之间没有发现太多的差别。根据是第四段第一句：Hearing tests were carried out before and after the exposure, which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group．在听音乐前后分别进行了听力测试，结果发现几乎每次都能够在噪音接触组和对照组之间观察到重要的临界点和发出声音的变化。因此该句话是错误的。
据调查，欧美大多数年轻人将音量调到最高收听MP3的时间都过长。根据是第五段第二句：Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players, often for several hours a day at maximum volume．研究表明，欧洲和美国超过90% 的年轻人使用MP3，而且经常每天将音量开至最大连续听数小时。因此该句话是正确的。
在60/60原则中，第二个60指的是最高音量的60%。根据是第五段第三句：Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume．听力专家建议60/60原则即每次听MP3时间不超过 60分钟，音量调节为最大音量的60%。因此该句话是正确的。
由最后一段最后一句Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk．可知，是欧洲委员会健康和安全部门的官员们，已经出台了计划将所有MP3播放器的最高音量统一设定为85分贝，而不是MP3的生产厂家已将最高音量设为85分贝。故题中说法错误。

第7题：

While setting up the threshold for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）

  • A、 It would result in an error because the warning threshold cannot be more than the critical threshold.
  • B、 The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.
  • C、 The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.
  • D、 Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.

正确答案:A

第8题：

____________, they immediately left the house.

A、Being heard the noise

B、Hearing the noise

C、They heard the noise

D、They were hearing the noise


参考答案：B

第9题：

hearing threshold


正确答案: 听阈是指足以引起人耳听觉的最小声强值。

第10题：

阈值（Threshold）


正确答案:由易患性决定的多基因病的发病的最低限度称为阈值。

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