▲ One of Samsung’s industry-leading anechoic chambers in Suwon is used to accurately evaluate the audio performance for various products

Samsung Newsroom sat down with Sunmin Kim and Seongsu Park from the Sound Device Lab within the Visual Display Business at Samsung Electronics to discuss the importance of audio in delivering a superior viewing experience as well as Samsung’s latest innovations in sound and picture quality.

Bringing Content to Life Through Sound

“Sound plays a very important role in making the content we consume immersive,” said Sunmin Kim, Head of the Sound Device Lab, Visual Display Business at Samsung Electronics. Be it romantic films, funny TV shows or even live sports broadcasts, Kim believes that a majority of the emotional impact from visual content is delivered through sound. “For example, it’s often the background music and sound effects that make horror films more terrifying. If you were to turn off the sound, many scenes wouldn’t be as scary. In fact, you may even find some scenes to be funny.”

▲ “The Sound Device Lab is committed to developing optimal solutions that deliver sound just as artists intended,” said Kim, Head of the Sound Device Lab, Visual Display Business.

“Film, TV and music directors are all artists. And what’s important to me is that they work to amplify stories through sound effects and music,” said Kim. “The goal here at the Sound Device Lab is to deliver content to viewers as the artists intended.”

This can be a daunting task because production and viewing environments tend to vary significantly. Seongsu Park, who oversees speaker development and audio evaluation in the Sound Device Lab, shared some of the challenges his team faces.

“Audio for movies and TV shows, in general, are mixed to a reference level of approximately 85 decibels (dB), equivalent to volume levels found in a movie theater. However, at home, many viewers watch the content at lower volumes. According to our research, many TV viewers reduce the volume to around 60dB, and some even to 20dB, to avoid disturbing neighbors,” explained Park. This means that dialogues that would have been audible in the mixing studio may be indiscernible in the living room. Engineers must consider additional differences in consumers’ viewing environments such as curtains, furniture and other elements that might absorb or deflect sound waves.

▲ “We’ve moved on from front-facing speakers to speakers all around the TV,” said Park of Samsung’s Visual Display Business.

The Sound Device Lab found solutions in the form of hardware and software innovations. From the hardware side, multiple smaller, specialized speakers were introduced to provide surround sound. The software side tuned these speakers to form a balanced audio experience and remixed the sound signals to ensure key sound factors are delivered to viewers.

From Few, Front-Facing to Many, Everywhere-Facing Speakers

TVs are usually limited to their set form factor when producing sound. Recently, this limitation has become increasingly restrictive for sound engineers as TVs have become slimmer from both the front and side. “In the past, huge front-facing stereo speakers were on each side of the TV screen. Current TV designs deny such placement,” said Park. “We were forced to dig deep.”

▲ TV designs have become thinner and slimmer, forcing sound engineers to get creative.

The Sound Device Lab responded to the challenge by developing multiple smaller speaker units for its TVs and placing them away from plain sight. By arranging these units in different directions and coordinating the audio output, the team was able to simulate surround sound.

This technology is further pushed in models that feature Neural Processing Units (NPUs), such as the Neural Quantum Processor found on select Neo QLED TV models, by unlocking features such as Object Tracking Sound (OTS). OTS identifies picture and audio objects on the screen in real time before matching, tracking and coordinating multiple speakers to create a dynamic three-dimensional soundscape.

▲ The latest Samsung TVs utilize a number of distributed speakers to offer a more 3D-like sound.1

To support slimmer bezels and flat-to-the-wall TV designs, sound engineers also had to reduce the physical size of the speakers. Speakers operate by physically pushing out air, so in many cases, speaker performance is directly affected by size. As the Sound Device Lab could not physically enlarge the speakers, it instead focused on the range of movement.

“Let’s say the moving range of a speaker driver is 100. Using 50-70% of that range was considered to be sufficient. To respond to slimmer TV designs, however, we raised that range to 80-85%,” explained Park. “As we fit smaller but more efficient speakers in our TVs, we were not only able to accommodate the slimmer design, but we also ended up improving the collective sound performance.”

▲ A wide range of speakers are strategically positioned in recent Samsung TVs, including up-firing and side-firing hidden center speakers as well as woofers that bounce deep bass off the walls.1

Creating Perfect Balance From Every Angle

While adding speakers resulted in a more immersive and dynamic audio experience, it posed another challenge. Sound engineers had to fine-tune and balance the multiple speakers to achieve a perfect blend of sound. With many speakers operating at differing frequency ranges and all facing different directions, tuning them to work in unison as a single balanced unit became exponentially difficult — but it had to be done.

The effort started with gathering accurate data. In anechoic and semi-anechoic chambers, the Sound Device Lab members measured TV sounds from 323 different points, covering the entire range of TV viewing, for each of the settings until the frequency and volume balance was optimal. After that, they took each model to listening rooms and simulated various real-life living room settings to ensure the speakers were tuned to perfection.

▲ Direct sounds, sans echoes and reverberations, are measured and tuned at a total of 323 points by adjusting TV angles. This is an essential process in tuning each unit to an optimal sound balance.

▲ (Clockwise from the top left) The images represent the following: (1) a graph measuring Sound Pressure Level (SPL) by frequency band at a specific angle, (2) SPL in a specific frequency space, (3) SPL by distance for all frequency bands and SPL by frequency band at an angle from a specific direction and (4) a graph combining measurements from all 323 points. This is the process of finding a “Target Curve” that ensures even sound distribution within the human hearing range, tuning each speaker to deliver excellent sound quality from any angle.

Future-Proofing Sound

As the global TV market leader for 17 consecutive years, Samsung remains committed to innovating the TV experience. So, what’s next?

“I was shocked when a colleague told me that the volume keys are the most frequently pressed buttons on a TV remote. This signals a clear inconvenience. So, it has become a vision of mine to remove the volume buttons completely from the remote control,” shared Park, expressing his desire to enable Samsung TVs to automatically adjust the volume based on surrounding noise.

“Great technology produces and delivers accurate sound,” said Kim. “We will continue to incorporate our long-running expertise with newer technologies such as AI to create as close a reference sound as possible.”

In the next part of this series, Samsung Newsroom will explore the role of AI in elevating audio performance and sound experiences.

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¹ Speaker locations may vary by model.

▲ (From left) Mingyo Oh, Haekwang Park and Shinhye Choi, at Samsung Electronics’ Visual Display Business behind Premium Soundbar, the HW-Q950A

With the increasing popularity of large screen televisions and the continued addition of further OTT (over-the-top) services, more users are looking to establish a theatre-like experience in their homes. On top of that, social distancing measures have required people to go out less, stoking their desire to enjoy premium visual and audio experiences from home.

Full, clear and deep sound plays a crucial role in ensuring that content is delivered as it was originally intended. Paving the way for new audio experiences, Samsung Electronics introduced its high-end soundbar models, the HW-Q950A and HW-Q900A, earlier this year. The new premium models take sound quality to the next level with up to 16 channels and a host of enhanced functions that help bring even greater satisfaction to users[1]. Samsung Newsroom met with the product experts of the 2021 soundbar models to find out the secret behind their powerful and precise sound.

11.1.4-Channel Surround Sound That Fills the Entire Room

▲ Haekwang Park, Principal Engineer at the Sound Device Lab, Samsung’s Visual Display Business

Thanks to our ever-evolving content culture, sound is getting richer, fuller and more expressive. The days of one-directional (mono) sound are long gone as we have ushered in the era of multi-directional channels that allow sound to fill up the surrounding space. “Sound is becoming increasingly important as people nowadays watch a wide variety of programs that place more emphasis on audio quality, such as music shows and films,” says Haekwang Park, Principal Engineer from the Sound lab at Samsung’s Visual Display Business.

To live up to consumers’ heightened expectations, Samsung has spared no effort in developing high-quality soundbar products that deliver very realistic sound. In 2016, Samsung brought its first 5.1.4-channel soundbar model to market. This soundbar was equipped with left, right and middle channels, two rear channels, a subwoofer and four upward-firing speakers, and delivered immersive, three-dimensional surround sound. More channels were added to later models, including a surround channel on the side of the soundbar and a wide surround channel to deliver sound from the front and sides. In 2020, Samsung introduced a 9.1.4-channel model.

In 2021, Samsung went a step further with its latest 11.1.4-channel model, the HW-Q950A, which features two rear surround channels. Product planner Mingyo Oh explained that, “The newly added channels are located on the sides of the rear surround speakers. They add liveliness to dynamic scenes involving things like airplanes in flight and car chases by allowing the sound to hit the side walls before it bounces back to where the audience is positioned.” The premium soundbar delivers an outstanding audio experience by filling previously quiet moments with powerful, immersive sound.

▲ Mingyo Oh from the Product Planning Group at Samsung’s Visual Display Business

Delivering Sound as Intended With Advanced Rendering and Waveguide Techniques

A channel is a passage for sound that dictates which direction it travels. This is why having a higher number of channels provides better, smoother sound. It usually requires costly equipment to offer 11.1.4-channel sound, but Samsung’s HW-Q950A is able to provide a breathtaking 3D surround sound experience with only four speakers thanks to its superb rendering and waveguide techniques.

Rendering is the process of creating a way for the audio output to deliver sound exactly as the artist intended. The Samsung developers made it possible to deliver an optimal acoustic experience with the soundbar system by tapping into its cutting-edge rendering technology. “To provide the most natural audio experience to users, we have carefully designed our products to deliver sound seamlessly. The HW-Q950A soundbar delivers sound that is reflected in various directions and arrives at users’ ears at the optimal angle,” related Shinhye Choi.

▲ Shinhye Choi from the Global Product Marketing Group at Samsung’s Visual Display Business

An advanced waveguide technique is also indispensable when it comes to delivering next-level sound. A multi-channel speaker emits sound in multiple directions, and the waveguide technique allows components in the speaker to deliver sound in the direction intended by the developer. Haekwang Park reported that, “Top-tier experts at the Visual Display Business’s Sound Lab and Samsung Audio Lab in California came together to design the parts that went into the speakers. Our soundbar models are meticulously constructed to deliver world-class sound performance.”

How SpaceFit Sound+ and Q-Symphony Further Elevate the Viewing Experience

Usually, most of the sound emitted by speakers hits walls or curtains before reaching the audience’s ears. This explains why the same sound is heard differently depending on the dimensions and layout of the viewing environment. Samsung’s HW-Q950A soundbar and 2021 TV models deliver stunning sound that tunes into users’ viewing environments by analyzing the dimensions of the space they’re in using SpaceFit Sound+[2].

SpaceFit Sound+ combines SpaceFit Sound technology, which delivers optimized audio, and Auto EQ (auto equalizer) technology. Together, the SpaceFit Sound and Auto EQ solutions use embedded microphones to thoroughly survey the viewing space, and then feed that data to the soundbar to enable it to deliver a tailored sound experience.

But the collaboration between the Samsung TV and the soundbar does not stop there. Samsung’s innovative, proprietary Q-Symphony technology additionally combines and enhances the sound generated by the TV and soundbar to provide optimal sound quality. Normally, when you connect a soundbar to your TV, the sound is emitted only from the soundbar. What’s more, there can sometimes be issues involving out-of-sync sound and tone disparities between the two devices. Q-Symphony[3] helps overcome these issues by incorporating a stereoscopic sound effect that allows sound to play through the speakers that wrap around the TV in addition to through the soundbar, providing richer and more realistic sound compared to when sound is produced through the soundbar alone.

Combining Truly Rich Sound With Highly Convenient Functionality

As with other models, Samsung has placed great emphasis on creating a new level of acoustic immersion with the HW-Q950A. But that doesn’t mean it can’t also include a host of convenient features. To begin with, the Auto Voice Amplifier (AVA) feature clarifies dialogue in the viewer’s favourite shows to help them hear on-screen conversations clearly amid a variety of background noises. With an embedded microphone, the soundbar automatically measures noise levels and enhances voices if the noise continues for more than three seconds or surpasses a certain threshold.

And the HW-Q950A optimizes sound for different types of scenes, such as those with loud sound effects and dialogue-heavy scenes. For instance, the Adaptive Sound feature analyzes sound signals to deliver an optimal sound experience for each scene. Moreover, Game Mode Pro delivers a powerful, immersive gaming experience with subwoofers and upward-firing speakers. The Tap Sound[4] feature also enables users to simply tap their smartphones on the soundbar when listening to a song to take their experience to the next level.

The motto of Samsung’s soundbar developers is to get the basics right when it comes to sound. “We are working our hardest to deliver sound of the highest quality,” the developers related. “We do this by collaborating closely with groups of experts and employing Samsung’s advanced measuring and simulation techniques to set clear standards for what we define as ‘optimal’ sound.”

The developers’ ultimate goal is to deliver a best-in-class acoustic experience to users regardless of the type of content they’re consuming, or the specific features of their viewing environment. Let’s keep our fingers crossed that they make this dream a reality.

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[1] When compared to previous Samsung soundbar models.

[2] SpaceFit Sound+ is compatible with 2021 Samsung QLED (Q70 and above). For a complete list of compatible models, please refer to Samsung.com for more information.

[3] Q Symphony is compatible with 2021 Samsung TV (AU8000 TV and above). For a complete list of compatible models, please refer to Samsung.com for more information.

[4] Tap sound is working through Bluetooth, and compatible with Samsung mobile devices with Android 8.1 and above.