听力文本

This is Scientific American 60-second Science, I'm Lucy Huang.
Mice and rats vocalize. To us, many of the sounds they make are ultrasonic—at too high a frequency to hear. But if we slow the calls down, they sound like squeaks. And not all squeaks are the same. The sounds that rodents make when they are excited versus disappointed can be quite different.
For example, here's slowed-down audio of a rat drinking sugar water.
(Rat squeak clip)
But this rat (different squeak) got played—it got non-sweetened water after becoming accustomed to sugar water.
"Calls around 22 kilohertz are usually associated with unhappy affect and calls around 55 kilohertz are happy affect."
John Neumaier, a professor of psychiatry and pharmacology at the University of Washington.
"So if you tickle a rat, it puts out a lot of 55 calls. If we give them a sucrose solution, then they put out a lot of calls at 55 kilohertz."
Being able to interpret these different calls can help researchers understand the rodent's emotional state—which could affect the results of experiments on the animals.

Of course, listening to rodents in real time eats up resources. To code one hour of a recording,
"It takes 10 hours, you know, because you have to slow these recordings down in order to be able to listen to them."
To automate the process, Neumaier's associates, Kevin Coffey and Russell Marx, used machine algorithms originally designed for self-driving cars to develop software that they call DeepSqueak. The program takes recordings of rodent squeaks and plots them by frequency and intensity. By transforming the audio to a visual representation,
"They were able to train the computer network to recognize what ultrasonic vocalization looks like and then to easily tell them apart from other kinds of noise."
The description of DeepSqueak is in the journal Neuropsychopharmacology.
The researchers have made the software available to any other scientists working with rodents who could use this kind of analysis.
"In my mind it will democratize this kind of research so that people can afford to do it, because it's been a huge barrier."
(Squeak noises)
Thank for listening for Scientific American 60-second Science, I'm Lucy Huang.

参考译文

这里是科学美国人——60秒科学系列，我是露西·黄7JyfQS)jHy!)WnGY^。
小老鼠和大老鼠都会发声B,Z4F-cbOX。对我们来说，它们发出的许多声音都是超声波——因频率过高而听不见kxt#^JADzU2*B。但如果我们将它们的叫声放慢，听起来就像是吱吱声JYwnKzZIe@40=fYSB,7。并不是所有的吱吱声都是一样的@_uiw#_xQung0UET0j。老鼠在兴奋和失望时发出的声音可能截然不同o3mx;BbP_0WX。
例如，这是大老鼠喝糖水时所发出声音的慢放音频O9a1]4xIxVYGvigECy#。
（老鼠吱吱叫的声音）
但这只大老鼠（不同的吱吱声）被耍了——在它习惯了糖水之后，研究人员给了它无糖水UgBbs85C#@ux[Fy。
“约22千赫的叫声通常与不快乐的情绪有关，而约55千赫的叫声表明的是快乐情绪I^q|G6D_oUx~9gl#wW。”
华盛顿大学心理学和药物学教授约翰·纽迈尔说到Z%1hN@M2T8ACQl#M@(7U。
“因此，如果让大老鼠开心，它会发出很多55千赫的叫声~8-)ofSU_OA。如果我们给它们蔗糖溶液，它们就会发出大量55千赫的叫声ORqxks7r@J;5sK*hQ。”
能够理解这些不同叫声可以帮助研究人员了解老鼠的情绪状态，而情绪可能会影响动物实验的结果uxQpn-E|PxK60eX。
当然，实时聆听老鼠的叫声会消耗资源L;#SoLimQK&D@D。要为一个小时的录音编码，
“需要花费10个小时，因为必须放慢录音速度才能听见d[SCdM;0iu。”
为了实现这一过程的自动化，纽迈尔的同事凯文·科菲和拉塞尔·马克思使用了最初为自动驾驶汽车设计的算法，来开发他们称之为DeepSqueak的软件nE(2-A,Y0nprJ|]vA。该程序记录老鼠吱吱叫的声音，并根据频率和强度绘制图表(C*Zbp+Ym3|QXkbLl。通过将声音转化为视觉表现，
“他们能够训练计算机网络识别超声波发声的样子，之后轻松地将其与其他种类的声音区分开来3k%bH0C87u。”
他们对DeepSqueak软件的描述发表在《神经心理药物学》期刊上G5r.]8bh1)D4&a~。
研究人员已将该软件开放给研究啮齿动物的其他科学家，他们可能会用到这种分析方法lssruMbGal。
“在我看来，这将使这类研究民主化，让人们能负担得起这种研究，因为这一直是巨大的障碍hstU)y3)p01Ha)1dVb-@。”
（吱吱叫的声音）
谢谢大家收听科学美国人——60秒科学系列，我是露西·黄maYRW[e*cd5FGZ。

译文为可可英语翻译，未经授权请勿转载！

重点讲解

重点讲解：
1. slow down (使)放慢；(使)减速；
The car slowed down as they passed Customs.
过海关的时候，车速慢了下来=!jl]k@30@f^-a。
2. be associated with (与…）相关的；相联系的；
These symptoms are particularly associated with migraine headaches.
这些症状尤其与偏头痛相关rxY75B;joawtP+91。
3. eat up 耗费（大量金钱、时间或资源）；
Health insurance costs are eating up his income.
医疗保险费用花掉了他大量的收入[k0@E]%NU1zOa4=H@2M。
4. tell apart 区分；区别；辨别；
Free range and battery eggs, boiled for four minutes, were hard to tell apart.
柴鸡蛋和笼养鸡蛋在煮过4分钟之后很难区分.^J0h_Za2Z._。