You are being provided with a book chapter by chapter. I will request you to read the book for me after each chapter. After reading the chapter, 1. shorten the chapter to no less than 300 words and no more than 400 words. 2. Do not change the name, address, or any important nouns in the chapter. 3. Do not translate the original language. 4. Keep the same style as the original chapter, keep it consistent throughout the chapter. Your reply must comply with all four requirements, or it’s invalid.
I will provide the chapter now.

KEEP IT DOWN!
 
 
            The sound of the Big Bang happened on such a low frequency that
even if humans were around, they wouldn’t have been able to actually
hear it!
 
            Synesthesia is a condition where people see different colors
accompanying music and other sounds. It’s estimated that 1% to 4%
of the population has synesthesia.
 
            Modern scientists believe the volcanic eruption on Mount Thera,
Greece around 1,600 BCE measured seven on the Volcanic
Explosivity Index (VEI). If so, it was the loudest sound in history.
 
       Cats and dogs have an excellent sense of sound, but they’re nothing
compared to dolphins. Dolphins can hear sounds 15 miles away.
 
            A whip needs to travel faster than the speed of sound to make the
cracking noise. That means a whip goes 767 miles per hour when it’s
cracked.
 
            Hearing loss is a global problem. According to the Hearing Health
Foundation, the number of people with hearing loss is more than
those with Parkinson’s Disease, Epilepsy, Alzheimer’s Disease, and
Diabetes combined.
 
            Paleontologists aren’t sure of the exact sounds dinosaurs made, but
they probably included snorts, grunts, hisses, and roars, depending
upon the species. The Lambeosaurus may have even made a honking
noise due to the hollow crest on its head.
 
            Molecules are needed to produce sound and since there are no
molecules in space, there’s no sound in space. It kind of ruins the fun
of Star Wars and Star Trek!
 
            The loudness of sound is measured in decibels. A typical car horn
puts out 100-110 decibels, while a crying baby can belt out 115
decibels!
 
       The first sound film, or “talkie” as they were called at the time, was
The Jazz Singer in 1927. Silent films continued to be produced into
the 1930s.
 
       The Orfield Labs anechoic chamber in Minneapolis, Minnesota was
listed as the “quietest place on Earth” in 2005 and 2013 by the
Guinness Book of World Records.
 
            The Alpheus or pistol shrimp is only about two inches long when
fully grown, but it’s snapping claws can create 218 decibels of sound.
That’s right up there with whales!
 
       The Last Ice Age would have been very audible to those living near
the glaciers. Just as they do today, the glaciers would have been
notable for their crackling, gurgling, and booming noises.
 
       The atomic bombs dropped on the Japanese cities of Hiroshima and
Nagasaki on August 6 and 9, 1945, respectively, reached 240
decibels.
 
       Infrasound is sound waves that register below what humans can hear.
Homing pigeons can perceive infrasound, but how they use that for
navigation is a mystery.
 
            A “humming” sound of unknown origin has plagued Taos, New
Mexico for decades. Strangely, though, only 2% of the population can
apparently hear this noise.
 
            The world’s first musical instruments were heard in Mesopotamia
and Egypt in about 2,800 BCE. Some of the early instruments
included lyres, sistra, and cymbals.
 
       Tinnitus is an annoying ringing in the ears. According to the NIDCD
Epidemiology and Statistics Program, 10% of Americans have
experienced it in the last year.
 
            Hertz (Hz) is the measure of vibrations or sound waves per second.
The range for humans to hear something is between 1,000 and 6,000
Hz.
 
            In the 500s BCE, the Greek colony, Sybaris, in Italy, passed one of
the earliest known noise ordinances. It prohibited tinsmiths and
roosters from the city limits.
 
            The ossicles is the collective name of the three bones in the middle
ear: hammer, anvil, and stirrup. They are the three smallest bones in
the human body, but without them, we’d be deaf.
 
            A massive earthquake hit the Greek island of Rhodes in 226 BCE
that could be heard for miles. It was big enough to destroy a large