Buzz
A major factor behind the advanced nature of human communication, compared to other animals, is our exceptional mastery of our voices. Alongside body language, the voice is the first tool of communication we learn. With just a few years of practice, we become proficient, and this remarkable ability seamlessly integrates into our daily lives. Most people forget that it's a learned skill at all. However, scientists have not forgotten, and they’ve made some astonishing discoveries about the human voice. From its connection to fish to its role in shaping architecture, here are ten truly strange facts about human voices.
10. The Origins of Human Vocal Cords Trace Back to Fish
Evolutionary biologists suggest that every creature capable of producing sound owes its vocal cords to prehistoric fish. Around 530 million years ago, a lucky fish was born with a mutation that allowed it to extract oxygen from the air. More importantly, it was able to reproduce and pass on this trait.
Over thousands of years, its descendants evolved into lungfish, which developed both lungs and a valve to prevent water from entering their respiratory system. This valve remained in place as humans evolved, eventually becoming the vocal cords. The voice is produced when air from the lungs passes through, causing parts of this valve to vibrate and produce sound.
9. Early Human Speech May Have Resembling Beatboxing Sounds
How could scientists possibly know what the speech of our ancient ancestors sounded like? While they can't know for sure, they can make well-informed guesses by studying the communication methods of other great apes. For example, researchers discovered that orangutans possess a unique vocal ability similar to humans: they can produce two vocal sounds simultaneously. In moments of aggression, male orangutans from Borneo produce sounds known as 'chomps' and 'grumbles.' Interestingly, scientists found that one male orangutan could produce both sounds at once, much like a human beatboxer replicating drums and other instruments.
To ensure this wasn't just a peculiarity of Bornean orangutans, researchers also observed orangutans in Sumatra, Indonesia. There, female orangutans were observed creating 'kiss squeak' and 'rolling call' sounds simultaneously. These noises served as warnings to other orangutans about approaching predators. This discovery suggests that other great apes can produce two vocal sounds at once, leading scientists to believe that early humans might have had similar abilities. It’s even possible that early human communication resembled beatboxing-like vocalizations.
8. The Voices of the Deceased Can Be Brought Back to Life
In 2020, an ancient Egyptian mummy spoke for the first time in millennia. Well, not exactly 'spoke'—it groaned. No, the mummy hadn't turned into a zombie. The 3,000-year-old Egyptian priest, Nesyamun, had his voice resurrected through modern technology. Scientists utilized CT scans of his vocal tract to create a 3D-printed model of it. This model was connected to a speaker, and an electronic signal was sent through it to replicate the sound produced by a human larynx.
The outcome was a single vowel sound, which the researchers believe is what would be heard if Nesyamun's larynx were revived. This research hints at a future where we could actually hear ancient history, not just view it through ruins and artifacts. However, the software used to recreate these ancient voices still requires further refinement.
The sounds produced by the vocal tract are affected by various factors, including its positioning and how much flesh remains. In the case of Nesyamun, he had been lying down for 3,000 years with very little tissue left, and his tongue was almost completely gone. While the recreated sound of his voice is a promising start, it is still a far cry from what the Egyptians would have heard when listening to his speeches and songs.
7. Animals Are More Afraid of Our Voices Than of Lions
A 2023 study revealed that animals at Kruger National Park in South Africa are more frightened by human voices than by the roars of lions. When recordings of human speech in local languages were played to antelopes, elephants, giraffes, leopards, and warthogs, nearly 95% of them fled. The animals were less disturbed by the sounds of lions, with some elephants even attempting to confront the imaginary predator.
These findings align with similar reports worldwide, showing that animals fear humans more than other creatures. This presents a challenge for wildlife tourism, as tourists can unintentionally scare off the very animals they hope to observe. Other studies suggest that this fear may even reduce animal populations, highlighting the need for strategies to mitigate such fear. One potential solution currently being tested involves using human voices to deter rhinos from areas frequented by poachers.
6. Many Animals Are Capable of Mimicking Human Speech
It's well-known that parrots and certain other birds can imitate human speech. While they are among the best at this, they aren’t the only animals capable of mimicking our words. In 1984, a beluga whale named Noc amazed researchers by producing sounds resembling human speech. Rocky, a popular ape at the Indianapolis Zoo, imitated his keepers' speech in exchange for food. Additionally, an elephant named Koshik cleverly inserted his trunk into his mouth to replicate human sounds.
In 2018, scientists discovered that orcas are also capable of copying human words. However, there’s no evidence they understand the meaning behind the words they mimic. A 14-year-old orca named Wikie, from France, was able to repeat simple words like 'hello,' 'Amy,' 'ah-ha,' 'one, two,' and 'bye-bye' on command. She also picked up new orca sounds she had never heard before, which suggests that orcas learn sounds by mimicking them. This could explain why wild orcas, like humans, have regional dialects in their communication.
5. Babies Can Recognize Emotion in Speech as Early as Three Months
In 2011, scientists demonstrated that certain brain areas specialize early in human development. They did this by using fMRI scans of sleeping babies exposed to emotional sounds, such as crying and laughing. The scans showed that when the babies heard a human voice, the same brain region was activated as in adults. This region, known as the temporal cortex, plays a key role in many of our most advanced cognitive functions, including semantic processing and language.
Researchers have discovered that babies’ brains are capable of distinguishing between sad and happy sounds, with the sad sounds triggering a more pronounced response in the limbic area of their brain. This insight into how babies begin to perceive emotions might offer valuable clues about the development of conditions such as autism.
4. The Universality of How We Talk to Babies
When we gaze into a baby’s innocent, yet perplexed face, most of us instinctively use a high-pitched, joyful tone. This tone often fluctuates in pitch, resembling a melodic pattern. It feels so natural that we rarely pause to wonder if people in other cultures do the same. However, research confirms they do. This unique style of communication is even known by a scientific term: IDS, which stands for infant-directed speech. Interestingly, babies can discern when this type of speech is used incorrectly—like when someone speaks in an infant-directed way, but there’s no baby around to listen.
This speech style seems to be an instinctive tool, particularly for mothers, to aid in language acquisition for babies. In certain languages, IDS places more emphasis on vowel sounds, which helps babies differentiate between words. It also conveys emotions more vividly. By three months of age, babies can already interpret emotional cues from the tone of someone’s voice. In fact, voices play a pivotal role in their emotional development even earlier. From birth, babies show a clear preference for their mother’s voice and language, having heard it so much while in the womb that they can easily identify it from others.
3. The Potential of Human Voices to Break Glass (Theoretically)
Although it's not impossible for a person to break glass with their voice, cartoons often portray it as surprisingly easy. The key is not just reaching a high pitch; it's about hitting a frequency that matches the glass's natural resonant frequency—the tone at which the glass vibrates most efficiently. If the vibrations are strong enough, they can cause the glass to shatter. This pitch is typically about an octave above middle C, though it can vary.
Even someone without vocal training can achieve this pitch relatively easily, but the challenge lies in producing vibrations strong enough to break the glass, which requires immense volume. Most people, including trained singers, simply can't produce enough loudness. On a TV show, Mythbusters, a performer managed to sing nearly as loudly as a jackhammer, yet only broke one glass out of 12 attempts. For those singing at home, don't worry—your windows and mirrors are likely safe, no matter how talented or off-key your voice may be.
2. Voices Have Shaped Architecture for Millennia
The impact of human voices extends beyond violins, influencing architecture for thousands of years. Architects have long designed buildings to amplify, project, and alter the human voice. A prime example is the ancient Mayan city of Palenque, where the public squares and temples are designed to project voices with incredible clarity. These structures date back to around AD 600, and were even equipped with special rooms where priests may have chanted or sung for citizens to hear. Essentially, these buildings functioned as enormous PA systems.
There are even older examples. In Peru, a 3,000-year-old underground maze is said to alter voices, creating echoes from every direction simultaneously. Some experts suggest the maze may have been constructed to confuse and disorient individuals within. Meanwhile, in Europe, such acoustic techniques have been used to intensify spiritual experiences. One example is Malta's Ħal Saflieni Hypogeum, a 5,000-year-old underground temple, where a room creates the eerie sensation of multiple voices converging when someone’s voice hits the 110Hz frequency.
1. Priceless Violins Resemble the Human Voice
When the name Stradivarius is mentioned, many may envision violins that have stood the test of time, with prices soaring into the millions. One might also wonder how an instrument could be worth such an astronomical figure. Clearly, many people believe they are, given the impeccable condition these violins have maintained over centuries. But what makes them sound so extraordinary?
According to scientists, it is because these violins replicate the characteristics of the human voice. The tones emitted by Stradivarius violins are strikingly similar to the sounds made by the vocal cords of high-pitched singers, including tenors and contraltos. This discovery came from a study in which a violinist played 15 antique violins, and then speech analysis software compared the sounds to those of singers.
The findings back the claim made by composer Francesco Geminiani over 200 years ago, who stated that the tone of a superior violin should rival the most beautiful human voice. Early violin makers seem to have shared this belief. In the past, violins often accompanied singers, and mimicking their vocal sounds may have helped the instrument blend seamlessly with the music.
