Hearing Proction听力保护

TED演讲中的句⼦TED演讲中的句⼦ 引导语：TED演讲中的句⼦，记下它们，给你⼀个不⼀样的演讲，希望对你有所帮助。

1. [谈对⼈⽣的热情] It was an achievement worthy of Mahatma Gandhi, conducted with the shrewdness of a lawyer and the idealism of a saint. 他带来的效应堪⽐圣雄⽢地，兼具律师的机智和圣贤的理想主义。

“It’s okay. It was all so beautiful. Whenever you hear this, I will be there.” 情况没你想得那么糟，世界多么美好!每当你听到这⾸曲⼦的时候，我都在你的⾝边。

The secret of their extraordinary success lay precisely in that insatiable curiosity, that irrepressible desire to know, no matter what the subject and no matter what the cost. 他们取得⾮凡成就的秘密，是他们永不满⾜的好奇⼼和难以遏制的求知欲，以及对任何事物不计代价的付出。

“Live each day as if it is your last,” (Gandhi) “learn as if you’ll live forever.” This is what I’m passionate about. It is this inextinguishable, undaunted appetite for learning and experience; no matter how risible, no matter how esoteric, no matter how seditious it might seem. 要活就要像明天你就会死去⼀样活着(⽢地)，要学习就要像你将会永⽣⼀样学习。

保护听力的方法作文英文回答：Protecting our hearing is crucial in today's noisy world. Excessive noise exposure can lead to hearing loss and other auditory problems. Therefore, it is important to adopt effective methods to safeguard our hearing. In this essay, I will discuss some strategies to protect our hearing.Firstly, one of the key ways to protect our hearing is to reduce exposure to loud noises. This can be achieved by wearing earplugs or earmuffs in noisy environments such as concerts, construction sites, or airports. These protective devices help to block or reduce the intensity of sound entering our ears, thus minimizing the risk of hearing damage. For instance, I always wear earplugs when attending concerts, as the loud music can be harmful to my hearing.Secondly, it is crucial to maintain a safe distancefrom loud sources of noise. By keeping a reasonable distance from loudspeakers, machinery, or other noisy equipment, we can reduce the intensity of sound reaching our ears. For example, when watching a live performance, I prefer to sit further away from the speakers in order to protect my hearing.Additionally, taking breaks from noisy environments can also contribute to hearing protection. Continuous exposure to loud noises can be detrimental to our auditory health. Therefore, it is important to give our ears a rest by stepping away from noisy situations periodically. This can be as simple as stepping outside for a few minutes during a loud party or taking a break from using headphones after prolonged use. Personally, I make it a point to take short breaks from wearing headphones while listening to music for an extended period of time.Furthermore, adopting good listening habits can also help protect our hearing. This includes keeping the volume at a reasonable level when using headphones or earphones, and limiting the duration of exposure to loud sounds. It isrecommended to use the "60/60 rule" listening to music atno more than 60% of the maximum volume for no longer than60 minutes at a time. By adhering to this rule, we can prevent excessive noise exposure and reduce the risk of hearing damage. For instance, I always make sure to follow this rule when using my headphones, as it helps to protect my hearing.In conclusion, protecting our hearing is of utmost importance in today's noisy world. By reducing exposure to loud noises, maintaining a safe distance, taking breaksfrom noisy environments, and adopting good listening habits, we can safeguard our hearing and prevent potential auditory problems. Let's prioritize our hearing health and take proactive measures to protect it.中文回答：保护听力在现今嘈杂的世界中至关重要。

3M Hearing ConservationLeading the advancement of hearing conservationNoise is everywhere. It is the most pervasive environmental pollutanton the planet. Virtually everything we do makes noise, and the morewe do it, the faster we do it, and the more of us there are - the morenoise is made. In fact, silence, by which we mean complete absolutequiet, is so rare that few of us have had the joy, or perhaps even thepossibility to experience it. If we have, it is so unusual that we canlikely cite the time and place of its last occurrence. The opportunitiesto savor such tranquility are rapidly vanishing.Know your hearing protectionThe Sound Around UsNot only is noise present in our daily routines and recreational activities,but upwards of 5 million Americans, possibly as many as 30 million, work in hazardous noise on a daily basis. Estimates from the National Institutes of Health suggest that hearing loss afflicts 28 million Americans. About 1/3 of those cases are at least partially attributable to noise. Later in this booklet we’ll tell you how the ear works and how noise can affect it, so you will understand why you should protect your ears from too much sound today in order for your hearing to serve you tomorrow.In a world as noisy as ours we frequently tune out. Moreover, our culture is so visually dominant that often sight overwhelms the other senses such as audition (the hearing of sounds), which is habitually relegated to second-class status. The purpose of this pamphlet is to address these issues – to increase your appreciation and awareness of the sounds around you and to provide some tools to help you protect yourselves from loud, annoying and/or hazardous sound.Pain threshold Dual protection may be needed Short exposures can cause perma-nent hearing loss Prolonged exposure causes moderate to severe loss. Wear hearing protectors with extra careProlonged exposure causes mild to moderate loss. Hearing protectors requiredProlonged exposure causes slight hearing loss. Hearing protectors recommended Residential boundary-noise limit Sleep disruption may begin Threshold of HearingJet Takeoff Basketball Game Crowd Noise Large Stamping Press Chain Saw Vacuum Cleaner Inside Mid-Size Auto (65 mph)Drilling Concrete Leaf Blower Conversation Floor Fan Quiet Library Rice Krispies Watch Ticking Quiet Wilderness (no wind)Measuring NoiseNoise hazard depends on the level (sometimes called intensity) of the noise, its duration , and how often the exposure occurs. The point above which regular exposure to sounds becomes hazardous is a level of about 85 decibels (abbreviated dB, or sometimes dBA which is the value that more closely corresponds to human hearing). Noise is measured using a soundlevel meter.You Don’t Get “Used to Noise”Noise does not have to be uncomfortably loud, or even painful, to be damaging. You may think your ears are “used to the noise,” but what has probably happened is that your hearing has been temporarily dulled or that hearing loss has already begun. A Rule of Thumb When you feel the need to shout in order to be heard three feet away, the noise levels are probably 85 dBA or more and hearing protectors are ing Your Ears to Assess Noise Risk If, after the noise stops, you notice a ringing, buzzing, or whistling in your ears that wasn’t there before, this is a warning indicator. Called tinnitus , this is like a “sunburn” of the nerve cells of your inner ear, indicating that they have been irritated and overworked. Tinnitus is especially noticeable in a quiet place, such as when you are trying to go to sleep at night. If you don’t protect your ears from noise, tinnitus can become a permanent, constant annoyance in your life.Apparent muffling or softening of sounds after noise exposure is a warning sign that your hearing is affected by a temporary threshold shift . Repeatedly exposing your ears without protection can cause the shift to worsen and become permanent, resulting in untreatable damage to your hearing ability.Hearing ProtectionHearing loss due to noise is almost entirely preventable by judicious use of hearing protection. To find what is best for you, try different devices from the wide variety available today. Be sure to carefully read the instructions because hearing protectors must fit properly and be worn correctly to do the job. Hearing protector effectiveness is specified by a Noise Reduction Rating (NRR), typically ranging from 15-35 decibels. In practice the protection that normally can be achieved is about 10-20 decibels. The more carefully you fit and wear hearing protectors, the higher your protection will be. Hearing protectors may feel uncomfortable at first, but give yourself a chance to get used to them, just as you do with a new pair of shoes or glasses.Foam plugs, made from expandable slow-recoveryfoam, provide the best combination of comfortand protection for most users. They must be properlyprepared for insertion. One size fits most. Once in theear, foam plugs expand to provide a snug and securecustom fit. The two most common complaints about foamplugs (“not enough protection,” and “they don’t stay in”)are almost always solved by greater practice and care ininsertion.Premolded plugs are made from flexible materialsthat are preformed to fit the ear. They are generallyavailable with a joining cord to prevent loss. Althoughthe version pictured at the left is a one-sized product,many premolded plugs are sold in two or more sizes andmust be individually sized for each ear. If after aperiod of regular wear you’ve been unable to get used toyour earplugs, try another size, type, or brand of hearingprotector.Earplug Fitting TipPress firmly cupped hands over your ears while listening to a steady noise. With properly fitted plugs the noise levels should be about the same whether or not the ears are covered.How Much ProtectionDon’t get hung up on the NRR, the government-mandated noise protection factor that appears on all hearing protector packaging. The numbers are based on optimized laboratory tests that, in practice, represent what only a few of the most-motivated best-trained users can achieve. Your best bet is to use the NRR only as an indicator that a product was designed and tested for noise reduction. Except for very loud noises such as gunfire where selection is more critical, most hearing protectors provide sufficient protection when worn properly and consistently. Foam plugs or earmuffs, or a combination of the two generally provide the highest levels of protection.Slowly roll andcompress foamplugs into a verythin crease-freecylinder. Whilecompressed,insert plug wellinto the earcanal.Fitting is easier if youreach around the head to pull the ear outward and upward during insertion.Keep the plugs cleanand free from materialthat can irritate theearcanal. They maybe washed in mildliquid detergent andwarm water. Squeezeexcess water from theplugs and allow to fullyair dry. Washing may berepeated several times. Discard plugs if they noticeably change their firmness or do not re-expand to their original size and shape.Premolded plugs willnormally last severalmonths or moredepending uponthe type, andenvironmentalfactors. They shouldbe replaced if theyshrink or swell, hardenor soften, tear, crack, orbecome permanently deformed. Wash them in warm soapy water and rinse well.When dry, store them in a carrying case.Reach around the backof your head andpull outward andupward on the earwhile insertingthe plug until youfeel it sealing.This may seem tightat first, especiallyif you’ve never wornearplugs. Carefully twist the plug to break the seal for a slow, safe removal.Hearing ProtectionInitially you may be concerned that you’ll be unable to hear while wearing protection. However, unless you already have a significant hearing loss you’ll be surprised how well you can hear speech and many other sounds while protected in the noise.When you properly wear hearing protectors you’ll be protected from temporary hearing shifts so that you are able to hear as well after a noise exposure as when it started. People with hearing loss also benefit, since without protection noise will continue to damage their hearing until it is difficult to distinguish sounds under even the best of conditions.Semi-inserts, also called canal caps, consist of pods orflexible tips on a lightweight headband. Because they arequick to put on and take off and easy to store around theneck, they are ideal for intermittent use. Those thatjust cap the canal entrance give rise to a larger occlusioneffect (see above) which can be annoying to some wearers.Earmuffs have rigid cups with soft plastic cushions thatseal around the ears to block noise. Muffs come in one-position or multi-position bands, and are also sold in stylesfor attachment to hard hats. Cushions may be filled withfoam, liquid, or a combination; let personal preference beyour guide. For sustained exposures to very loud noises,or if you feel the need for more protection, wear muffs andplugs together (dual protection) for an additional 5-10dB of noise reduction.Hearing Protector Fitting TipWhen either a plug or muff is properly fitted, the sound of your own voice should change, becoming deeper, hollow, or muffled due to what is called the occlusion effect. If you don’t hear the change, or if it isn’t the same in both ears, you have not obtained a proper fit and acoustic seal in either one or both ears.Tip: Talking in NoiseWhen you wear plugs or muffs in noise you tend to speak less loudly than otherwise because the protector makes your own voice seem louder and the surrounding noises seem quieter. So, you have to speak up – speak more loudly than you think you need to. Others will appreciate this, and your message will be better understood.Hold the large endsof the pods andswivel them todirect the tipsinto the earcanalopenings. Firmlypush and wigglethe pods intothe canals untila snug seal isobtained. Pulling on the outer ear while pushing on the pods will behelpful to most wearers.Most semi-inserts can becleaned in the sameway as premoldedearplugs. Since theheadband holdsthe tips in place toprovide an acousticseal, don’t tamperwith it or the protectionthe device provides maybe reduced. Many manufacturerssell replacement tips.Cushions can be cleanedwith warm soapy waterand rinsed thoroughly.Do not use alcoholor solvents. Cushionsnormally needreplacing at leastyearly, or wheneverthey become stiff,cracked, or no longer seal.Don’t modify earmuffs in any way, and especially do not stretch or abuse the headbandsas this will reduce your protection.Muffs must fully enclosethe ears to sealagainst the head.Adjust the head-band so cushionsexert even pressurearound the ears toget the best noisereduction. Pull hair backand out from beneath the cushions. Don’t store pencils or wear caps under cushions. Thick or poorly fitting eyeglass tem-ples may also cause some loss in noise reduction.Specialized Hearing ProtectorsMusician’s EarplugsCertain earplugs are designed for moderate noise reduction andbetter sound quality (more uniform attenuation across therange of frequencies). For many sound exposures such as livemusic, public events, and transportation, these devices providethe needed protection, while making listening easier and moreenjoyable. The effect with these earplugs can be compared towearing medium neutral-gray sunglasses instead of very darkcolor-tinted lenses that dramatically change one’s perception. TheProfessional Musician 3M™ E-A-R™ Plug is one such product.Special types of custom earmolds also provide this feature.Custom Molded EarplugsCustom earmolds can be very comfortable. They are suitable for useas hearing aids and as earplugs for hearing protection. As earplugsthey can be made from a custom impression of the earcanal usingmaterial with the consistency of thick honey (usually sent to a labfor final fabrication), or in the case of a unique product calledthe 3M™ CustomE-A-R™, by injecting silicone into a speciallydesigned (yellow) bladder. The bladder design is safer to make,ready to wear, and can be immediately acoustically verified forfit. Such fit verification is important since the acoustic seal of anearmold can be compromised if the impression is not precise for anexact fit.Electronic EarmuffsSome earmuffs use a microphone embedded in the earcup topickup sounds and transmit them through the earmuff to anearphone inside. This allows better hearing at low soundlevels without the need to remove the device, while stillproviding sufficient protection at higher sound levels. Typicallythe electronics in the muff limit the amplified sound to apredetermined safe value such as less than 85 dBA. These muffscan be excellent for use while hunting or on the firing line, and forthose with a mild hearing loss they can actually amplify sounds, thusmaking it easier to hear.Active Noise Reduction (ANR)Today it is possible to use sound to cancel sound. A microphone withinthe earmuff detects the sound passing through the cup walls andsends that signal through circuitry to generate an anti-phase versionthat is rebroadcast through a speaker in the cup. The result is soundcancellation, but due to physical limitations this process only workswell in the lower frequencies, middle C and lower. This is effective incertain military situations, and in general aviation, especially when thedevices also include communications. The principal consumer applicationis reduction of nuisance noise such as experienced while traveling. An ANRearmuff, which also plugs into an earphone jack on entertainment devices, can provide balanced noise reduction while simultaneously permitting listening to music or movies.Your Hearing How it works and how we measure it How We HearHealthy inner-ear nerves (hair cells) are the key to good hearing.Although some die off naturally as you age, many more are killed early if your ears aren’t protected from harmful noise.The outer ear collects andthe earcanal to the eardrum.The middle ear contains a chain of three tiny bones, called ossicles, which link the eardrum to the inner ear. When sound waves strike the eardrum, the ossicles conduct the vibrations to the cochlea in the inner ear.Measuring HearingHearing is measured by a professional with an audiometer that sends tones to each ear through earphones. You listen carefully and respond each time you hear a tone. The levels at which you can barely hear the tones are your hearing threshold levels .Your thresholds (measured in decibels) are recorded on a chart called an audiogram , for tones at different pitches or frequencies (measured in “Hertz,” which is a special term for cycles/second). Normal thresholds fall within the unshaded area on the chart. When hearing loss occurs the thresholds fall into the shaded areas, meaning sounds must be increased in level for you to hear them.It is a good idea to have a complete hearing evaluation even if you don’t suspect a hearing problem. This gives you a baseline if problems occur. Professionals suggest evaluations every 10 years; more often for those over 50. If you anticipate regular exposure to high-level noise, for example if you are an avid recreational shooter, you may wish to obtain more frequent tests until you can assure that your hearing is stable. Unusual changes would alert you and your hearing specialist (audiologist or otolaryngologist) to look for noise-related (inadequate or improperly fitted protection) or medical causes before it’s too late.Do Yourself a Favor -Save Your Hearing!Person-to-PersonCommunicationInarguably, the most important functionof our hearing is communication. Aperson with hearing loss may not hear orunderstand family members and friends,particularly women and children withhigh-pitched voices. Communication overthe telephone for business or pleasurebecomes more difficult. The individualwill confuse similar-sounding wordsand mistake the message. Embarrassedto ask the speaker to repeat, the listenermay just “tune out.” Conversing ingroups is most difficult, especially ifthere is background noise. People withhearing loss often become socially isolatedas others find it too much trouble to speak to them.What’s more, hearing aids can’t completely correct the problem because louder sounds are not necessarily clearer to the damaged ear.Often the message is as much in the sound of the voice as in the content of the speech. Poet Maya Angelou has observed, “Words mean more than what is set down on paper. It takes the human voice to infuse them with shades of deeper meaning.”Effects of Age and Noise on HearingHearing loss from the natural aging process causes agradual hearing decline, as shown in the figure to theright. It affects mainly the ability to clearly hear high-pitched sounds such as children’s voices, rustling leaves,and some musical instruments.Although age-effect hearing loss up through age 60 doesnot usually impair one’s ability to hear and understandspeech, problems occur when noise-induced loss is addedto age loss. The noise-induced component can comefrom occupational exposures as well as the many loudrecreational sounds we willingly expose our ears to on adaily basis. With noise damage, even a 30-year-old canhave trouble listening in situations in which backgroundsound is present, such as in restaurants and other socialsituations.Sounds You Want to Hear A hearing-impaired person may notbe able to enjoy ordinary sounds ofnature or even the sounds of pets, and distortion from damaged hair cellsmay make music seem like “just a racket.” It becomes difficult to detect problems with tools or car engines by listening for changes in the soundsthey make. It can be inconvenient to miss the sound of the alarm on your wristwatch or the phone ringing in the next room. Hearing-impaired people worry about getting hurt by missing danger signals such as warning beepers or smoke detectors. Remember:You Need Your Hearing! These comments from people with noise-induced hearing loss show why it is worth the effort to wear hearing protectors properly: your qualityof life depends on keeping your good hearing. Once hearing is lostit is gone forever. And if you aren’t willing to wear an earplug for hearing protection today, how would you tolerate wearing a hearing aid that fits to the ear with an earplug-like tip, every day and every waking hour for the rest of your life.Even if you already have some hearing loss, it is still essential to wear hearing protectors from now on to prevent the loss from worsening. Carry them with you like a pair of sunglasses so that whenever annoying or potentially damaging sounds assault your ears, you have the protection you need. It’s never too late to start conserving your hearing!…Always this ringing in my ears.My daughter no longer seems to speak clearly.I miss the birds, the wind in the trees, the whispers.I miss all the good sounds…Written by:Elliott H. Berger, M.S.,Senior Scientist, Auditory ResearchNoise Is All AroundBe aware of noisy situations such as theones illustrated to the right, so you canprotect yourself and enjoy a lifetime ofgood hearing.Occupational Health &Environmental Safety Division3M Center - Building 235-2W-70Saint Paul, MN 55144-1000Sales Assistance: 1-800-328-1667Technical Assistance: 1-800-243-4630Website: /OccSafety © 2010 3M Company.3M and all other trademarks used hereinor hereon are trademarks of 3M Company.These hearing protectors help reduce exposure to hazardous noise and other loud sounds. Misuse or failure to wear hearing protectors at all times that you are exposed to noise may result in hearing loss or injury. For proper use, see supervisor, User Instructions, or call 3M in U.S.A. at 1-800-243-4630. In Canada, call Technical Service at 1-800-267-4414. If there is any drainage from your ear or you have an ear infection, consult with your physician before wearing ear plugs. Failure to do so may result in hearing loss or injury.WARNING!XX-XXXX-XXXX-X Please recycle. Printed in USA.。

听力保护器选择、使用、保护和维修实施规范（草案）1.范围1.1对听力保护器的选择、使用、保养和维修提出建议。

1.2特殊类型的听力保护器不在本标准所规定的范围，然而它们可分类于6.4项目中，一些指导条文可能与其有关。

1.3在听力保持方案中，首先选择工程的与行政的噪声控制措施。

个体的听力保护器应该作为最后的使用设备。

2.定义在本标准中应用了以下的定义。

2.1设定的保护值 APVf听力保护器的倍频程（八度）衰减值以dB表示，是按照ISO4869-2倍频程（八度）方法得到的。

2.2A-计权声压暴露值，EA.T在一定时间过程（T），A-计权声压平方的时间积分值，以帕2小时（Pa2h）表示，如下式计算而得：⎰=21) (2.tt AT AdttpEP A (t)是从时间（t1）起到时间（t2）止期间内的A-计权声压的积分值2.3保养配戴者对听力保护器进行经常性保管的注意事项。

2.4有效保护The reduction in LAeq,8hachieved by wearing the hearing protection, taking into account the time for which it is worn during exposure to the noise.2.5等效连续A-计权声压级LAeq,T以dB表示，如下示计算：L Aeq ,T=10 lg[⎰2122)(1ttAPdttPT]时间过程为T，平均值取自起始时间（t1）至终点时间（t2）之间，P=2×10-5Pa2.6维修对保护器的经常性检查和修理，例如，置换耳帽中的损坏了的垫。

2.7噪声暴露水平，使之标准化成为日常8小时工作日的数值，Lex,8h，以dB 表示，计算公式如下：Lex,8h =Laeq×Te+10 lg(OeTT)Te是工作日中的有效时间(以小时表示)To是8小时中执行职务的时间2.8过度保护选择和配戴的听力保护器衰减能力过强。

在家如何保护听力英语作文Title: Protecting Hearing at Home。

In our modern world filled with various sources of noise, protecting our hearing is crucial. Even at home, where we assume it's safe from external noise pollution, there are still potential risks to our hearing health. Here are several measures you can take to safeguard your hearing within the confines of your home environment.Firstly, be mindful of the volume levels of electronic devices such as televisions, stereos, and personal music players. Excessive volume, especially when using headphones or earbuds, can cause irreversible damage to your hearing over time. It's recommended to keep the volume at a moderate level and take regular breaks to give your ears a rest.Secondly, invest in noise-canceling headphones or earplugs, especially if you live in a noisy neighborhood orhave loud household appliances. These devices can help reduce the impact of environmental noise on your ears, allowing you to enjoy a quieter and more peaceful atmosphere at home.Thirdly, practice good listening habits when engaging in activities such as watching TV, listening to music, or playing video games. Avoid turning up the volume to drown out background noise, as this can strain your ears and lead to hearing loss. Instead, try to minimize competing sounds and create a quieter environment conducive to healthy hearing.Furthermore, limit exposure to loud or sudden noises within your home. This includes activities like DIYprojects using power tools, operating kitchen appliances like blenders or food processors, or even engaging in vigorous exercise routines with loud music playing in the background. Whenever possible, use quieter alternatives or wear ear protection to mitigate the risk of noise-induced hearing damage.Additionally, be cautious during recreationalactivities that involve exposure to loud sounds, such as hosting parties or attending gatherings with amplified music. Consider setting up designated quiet areas where guests can retreat to if they need a break from the noise. Providing earplugs or earmuffs for guests can also demonstrate your commitment to protecting everyone'shearing health.Moreover, educate family members, especially children, about the importance of hearing protection and thepotential consequences of prolonged exposure to loud noises. Encourage them to follow the same practices you implementto safeguard their hearing from an early age.In conclusion, protecting your hearing at home requires awareness, mindfulness, and proactive measures to minimize exposure to loud noises and maintain a healthy auditory environment. By implementing the strategies outlined above, you can create a safer and more conducive space forenjoying daily activities without compromising your long-term hearing health. Remember, prevention is key when itcomes to preserving your precious sense of hearing for years to come.。

HEARING PROTECTION听力保护♦If your ears are continually exposed to high levels of noise even for a short period of time, you will begin to suffer damage to your hearing.如果你的耳朵连续地处于高噪音环境下，即使是短时期，你的听力也会受到损坏。

♦Over a period of time this will result in a permanent loss of hearing at certain frequencies.在一定频率下，超过一段时间，会导致长期的听力丧失。

♦Usually the frequency that is lost first is the noise frequency that is associated with speech and conversation.导致听力丧失的频率首先是影响交谈的噪音频率。

Noise Levels噪音程度♦Even though the maximum noise level that you can be legally exposed to without protection is 90 decibels our safety standards states that 85 decibels is the maximum.可以不戴听力保护装置的，法律规定的最大噪音程度是90分贝，但是我们现场的安全标准规定最大的噪音程度是85分贝。

♦To give you an idea of what this means, 85 decibels is equal to the noise you would hear if you were standing about 1 metre from a milling machine.我来让你明白这是什么意思，85分贝的噪音相当于你站在一米开外的设备处，仍能听见谈话。