首页
登录
职称英语
About 23 million headset stereos are sold in the United States each year. Mo
About 23 million headset stereos are sold in the United States each year. Mo
游客
2023-10-04
28
管理
问题
About 23 million headset stereos are sold in the United States each year. Most have one thing in common: they can cause hearing loss.
Studies have shown that sound levels from the machines can reach 115 decibels(分贝) or more—roughly equivalent to standing 100 feet from a commercial jet at takeoff. At the level, permanent hearing damage can occur after just 15 minutes. And the earlier a child begins using a headset, the more damage can accumulate. Loud noise causes hearing loss by killing irreplaceable hair cells in the inner ear. Normally, the process occurs slowly as people age, but noise damage can accelerate it.
Noise-induced hearing loss is insidious(不知不觉中发展的); Damage may not be apparent until later in life. Since headsets are used privately, parents often don’t realize how loud their children’s music is.
As a rule, experts say headset sound loud enough to be heard by passers (approximately 100 decibels) can cause damage if used more than two hours a day. The allowable time is halved for every five decibels above that. For example, at 105 decibels, the maximum is one hour.
Whatever your age, noise is dangerous if it hurts your ears, makes them ring or causes you to shout above it to be heard.
选项
A、cause hearing loss
B、cause mental disease
C、make people become mad
D、cause people become old
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3071182.html
相关试题推荐
HowmanyU.S.dollarswillbeinvestedintheproject?About______million.[br
HowmanyU.S.dollarswillbeinvestedintheproject?About______million.[br
HowmanyU.S.dollarswillbeinvestedintheproject?About______million.[br
Theword"institution"(line1)mostprobablymeans______.[br]IntheUnitedS
GuidedToursofUnitedNationsHeadquartersincludeanexplanationoftheaim
Themost(11)waytowelcomethenewyearintheUnitedStatesiswithabigp
Themost(11)waytowelcomethenewyearintheUnitedStatesiswithabigp
Themost(11)waytowelcomethenewyearintheUnitedStatesiswithabigp
ThenumberoftheyoungpeopleintheUnitedStateswhocan’treadisincredible
(near)______1.9milliongunswereproducedintheUnitedStateslastyear.Nearly
随机试题
Whatelectionarethespeakersdiscussing?[originaltext]M:Comeon,Julie,how
THEINTRINSICCOMPLEXITYOFCONCEPTSThewordsdiscussedso
TheRoadNotTakenisapoemwrittenbyA、RobertFrost.B、HenryLongfellow.C、Ezr
环箍效应是指试件受压时,试件的受压面与试验机的承压板之间的摩擦力对试件受压时相对
暂态地电压局部放电检测,应在开关柜投入运行(____)分钟后,方可进行带电测试。
根据下图材料,己村的粮食总产量为戊村粮食总产量的多少倍? A.2.34
员工直接上级的作用主要体现在()方面。A.日常工作中一般是由直接上级对员工进行评
下列关于商业银行高级管理层对市场风险管理职责的表述,错误的是()。A.负责
以下属于典型的反转形态是()。A.矩形形态 B.旗形形态 C.三角形态 D
在对进度计划调整时,大量超前领先的非关键线路()。A.应继续保持其领先地位
最新回复
(
0
)