In television and film, certain sounds, such as dialogue, may be difficult to understand due to sound mixing, device limitations, and technological advancements that have collectively reduced clarity.

Visualizing shifts in emotional performance in film

Computational scientists were curious: has the intensity of emotional expression in films changed over the decades? Using their sophisticated analytical models, the researchers discovered actors' emotional performance has declined in intensity over time. They believe the close-up shots common in contemporary film-making allows actors to be more subtle in their performance. Check out the main takeaways and charts with this unusual study.

Authoritarian regimes sometimes used film dubbing to censor ideas

Dubbing rose in popularity in the early 20th century because of relatively low literacy rates, which made subtitles impractical. Totalitarian regimes—including Mussolini's Italy, Franco's Spain, and Hitler's Germany—used dubbing to remove or alter unflattering or countercultural dialogue.

A person's voice sounds different when breathing helium, sulfur hexafluoride, or gases other than air because the speed of sound varies with the properties of the material through which it travels.

The 'second screen' effect has realigned the writing for Netflix's original shows

As more subscribers put Netflix on in the background, the company has encouraged more expositional dialogue in its original scripts. Filmmaker Justine Bateman claims the streamer doesn't "want anything on your show to distract [viewers] from their primary screen."

Interacting sound waves can create regions where the pressure from each wave combines, allowing objects to levitate in place against gravity or be manipulated for touch-free construction.

Noise-canceling headphones use a microphone to identify external sounds, which are then used to produce an out-of-sync version of those sounds to cancel them in your ears.

Horror video games rely on terrifying sound design

Horror has become a popular gaming genre, which designers say is due, in large part, to the games' soundtracks. Don Veca, the audio director for the game Dead Space, said, “Sound and music prepare the player to be scared – it’s all about the buildup, the tension, and then the release when something jumps out at you.”

Ambient sounds on Mars are lower-pitched and more muted than those on Earth

The planet's thin atmosphere absorbs higher frequencies, and audio captured by the Perseverance rover from the Ingenuity Mars helicopter revealed that sound waves travel farther than previous atmospheric models suggested.

With sufficiently sensitive hearing and powerful equipment, if a source of music traveled past someone at twice the speed of sound, they would hear the music backward.

People with tinnitus should avoid silence—sound-rich environments distract the brain

This podcast from an audiologist discusses common questions about tinnitus. It notes that tinnitus could be described as a phantom sound associated with hyperactivity in the brain. It's linked with loud sound exposures above 85 decibels, hearing loss associated with aging and stress, among other factors.

Why you may hate the sound of your voice

It's a relatively common experience to cringe while listening to a recording of your own voice. This Popular Science article offers physiological explanations for the discrepancy between what we hear when we speak versus what others hear. The piece also expands on the psychology behind this discontent, and how our voices influence our self-perception and social interactions.

New Oscar categories continue to be added

We all know about best picture and best actress, but the Academy Awards also honor people in lesser-known Hollywood roles, such as sound mixers and production designers. In 2026, for the first time in more than two decades, a new category will be added: an Oscar for achievement in casting.

How does the cocktail party effect work?

In the 1950s, British cognitive scientist Colin Cherry started to explore how we could focus our hearing on one single source, even in a noisy environment. This video animation explains the phenomenon known as the cocktail effect and how selective hearing works. Discover how our brain is on the lookout for important or personally relevant information, even as we are occupied in other discussions.

Within an anechoic chamber, all surfaces are covered with specialized materials that prevent wave reflection, helping prevent sound from echoing in the space.

Create professional-quality spoken audio from text

Generative AI now makes it possible to create everything from computer-generated written content to beautiful imagery and hyper-realistic videos in seconds from a user’s simple text prompt. Add to that list: High-quality spoken audio, which the AI software company ElevenLabs specializes in. Its natural-sounding speech synthesis and text-to-speech tech can produce human-like speech that mimics a variety of different tones, styles, and accents.

Digital re-aging and de-aging of faces in film and TV has become increasingly common

Traditional techniques for accomplishing this process were slow and labor-intensive, and often required manual frame-by-frame edits, forcing them to be reserved for "hero characters" and close-up shots. Deep learning methods used by Disney and other production companies now provide fully-automatic and production-ready methods to produce such deepfakes for entertainment purposes.

Billie Holiday's distinctive vocal technique was aided by new microphone technology

Unlike many of her contemporaries, Holiday's voice was more reserved and seductive. In the past, that wouldn't have been practical—earlier microphones required singers to belt in order to be heard throughout a club or theater. However, technological breakthroughs in the 1930s produced more sophisticated and sensitive microphones, enabling a singer like Holiday to experiment with vocal dynamics.

Audio deepfakes have fooled voice biometrics at banks

Limitations in facial and body movements as well as mismatches between audio and lip movements can sometimes help flag a video as a deepfake, but removal of the video component significantly improves AI mimicry.

A cochlear implant stimulates parts of the cochlea directly, with limited pitch and timbre capabilities

People with these devices have to learn or relearn how to train their brains to interpret nerve signals as sound. The range of the type of sounds that the brain can distinguish with a cochlear implant is limited and consequently it's difficult to understand a tonal language or distinguish individual speakers in a crowd.

Movie trailers changed after the king of voice-overs died

Don LaFontaine, known in the film industry as "Thunder Throat," provided voice-over for over 5,000 film trailers. After he died in 2008, the trailer formula changed, with most preferring to lean into dialogue from the film.

The art of miniature sets in Hollywood

Many films utilize meticulously designed miniature sets to produce scenes that would otherwise be too big to film. While artsy filmmaker Wes Anderson is well-known for reviving this technique in an idiosyncratic style, more mainstream films like "Star Wars" and "Inception" rely heavily on small-scale sets filmed in such a way as to make them appear normal-sized. This nine-minute video breaks down how it all works.

Why content disappears from streaming services

The early days of streaming suggested we'd have access to all the world's content whenever we wanted. Those days are now long behind us, with streaming companies removing hundreds of movies and shows from their services, including titles they funded. This explainer from the Guardian argues that the reasons behind this shift are both financial and cultural.

The platform's ease of use relies on a complex architecture

Hitting "play" on Netflix is easy, but it triggers a multistep process that fetches the selected content, converts it for your screen, and finds the closest server to deliver it in the highest quality.

Stonehenge may have functioned as an echo chamber designed to keep ceremonies secret from outsiders.

Acoustics researcher Trevor Cox discovered that Stonehenge acts like a concert hall, reflecting and amplifying sound. This video shows Cox demonstrating the effect using a scale model inside a soundproof studio.

'Silent' fireworks are not entirely noise-free

By using a reduced amount of flash powder—the ingredient responsible for the loud explosions that fireworks make—"silent" fireworks produce displays between 70 and 90 decibels, rather than the approximately 175 decibels heard in professional displays.

Acoustic Vehicle Alerting Systems provide motor sounds in electric vehicles

Since 2019, various global standards have set requirements for these systems, which seek to mimic combustion-engine sounds by meeting specific sonic criteria, including sound pressure, frequency, and pitch. Sound engineers design these systems to meet these requirements, ensuring that passers-by, particularly the blind and visually impaired, can detect the presence of a vehicle.

Some animals possess sensitive hearing to help pinpoint prey and map the world

Bats and dolphins produce sound to reflect off surfaces and create a mental image of their surroundings. Owls' faces are dish-shaped to help funnel sounds to their ears, including that of mice moving along leaves or snow. Pinnipeds, such as seals and walruses, hear in both air and water.

Breaking down the music theory of Hitchcock's 'Psycho'

One of the defining features of Hitchcock’s film “Psycho” (1960) is the music, especially the sounds you hear during some particularly grisly scenes. This analysis from The Music Professor analyzes how that music complements the film, highlighting the way strings match the intensity of the film’s screenplay and black-and-white cinematography.

A sound's pitch will seem to change if the listener or the source moves toward or away from the other because motion changes the time it takes each successive sound wave to reach the listener.

More than 5% of the world's population has disabling hearing loss

Disabling hearing loss is defined as hearing loss greater than 35 decibels in the better hearing ear. (For context, that means the sound of leaves rustling, at roughly 30 decibels, would be inaudible even to your better-hearing ear.) The World Health Organization's data suggests that more than 5% of the world's population has this level of loss requiring rehabilitation, which amounts to 430 million people—including 34 million children.

Objects that move faster than the speed of sound—Mach 1—create shockwaves called sonic booms by building up and forcing sound waves to combine as they lag behind the object.

Unlike the roars in movies, dinosaurs likely cooed, rumbled, and boomed

Fossil evidence and CT scans suggest that many dinosaurs produced low-frequency sounds using resonating crests, closed-mouth vocalizations, or organs similar to those of birds and crocodiles. Larger sounds would not have been helpful for sneakily hunting prey.

Mapping hearing loss in the US

Nearly 10% of Americans suffer from some degree of hearing loss, measured as the inability to hear sounds lower than 25 decibels. The incidence of hearing loss increases with age and is typically higher among men. Recent analysis produced a puzzling observation researchers can't quite explain: There's a larger incidence of hearing loss among rural populations than in urban centers. Explore the data with this map and explainer.

See this graphic describing what different decibel levels mean for hearing loss.

Netflix's original movies are intended to be in the background

Netflix's original content follows "taste clusters," those wildly specific tags for content, like "cerebral Southwestern murder mystery." The low-budget films and shows designed for these genre buckets are written with abundant exposition to remind casual viewers where they are in the story.

Soaps often air every day, leading to frantic production schedules

Unlike more typical primetime or streaming shows, soap operas often air every weekday. That means writers and actors often work every day to complete a new episode, making for a grueling schedule. It also explains why some of the dialogue and performances might seem a bit off-the-cuff.

Exploring how directors decide where to place the camera

The seamless experience of watching a film is the result of countless aesthetic decisions, one of the most important of which is the placement of the camera taking the shot. In this 8-minute video, directors and actors weigh in on the factors that shape the angles of cinematography, using famous scenes to demonstrate their observations. Watch it here.

Microphone technology made crooning possible

Before the electric microphone, vocalists needed to project to have their voices captured. The new technology, however, made softer, more intimate singing possible, leading to a new style of singing that took off in the late 1920s, with "crooners" becoming some of the first American pop stars.

Hearing loss can affect balance and make falls more likely

For reasons that are not yet fully understood, hearing loss seems to increase the risk of falls. One explanation is that reduced environmental awareness due to hearing loss may put people at greater risk. Another theory is that the brain has to work harder to process sound with hearing loss and that cognitive load may also boost the chances of falls. One study found that for every 10 decibel increase in hearing loss, there was a 1.4 fold increased odds of falling in the preceding 12 months.