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• ‘They didn’t just pick us up off the street!’ Meet the globally derided Squid Game VIPs
• Airlines ground dozens of Boeing 777 planes after engine failure over Denver
• Portable Air Conditioners
• Kenwood Corporation
• QSC in Action
• Best TV antenna for 2021
• WEITONG Fire Escape Ladder, Emergency Fire Escape Rope Ladder wi
• Samsung Amps Up Loudspeaker Designs with Simulation
• The 10 most dangerous jobs in America

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‘They didn’t just pick us up off the street!’ Meet the globally derided Squid Game VIPs

When you hear the name Samsung, you probably think of smartphones and televisions. However, Samsung has had a goal to be the number one audio company, too.

He assembled a team of engineers specializing in transducers, digital sound processing DSP , acoustics, programming, and more — but there was still a missing piece to the puzzle…. Without getting into the details, a mono system has only one channel, limiting its capabilities, whereas a stereo system has multiple channels that can playback multiple sources in parallel through multiple speakers, producing a better sound experience.

We can use a similar analogy to describe the loudspeaker development process. In , Andri Bezzola came onboard as an engineer specializing in simulation and numerical analysis. We visited the Samsung Audio Lab to learn about how they use multiphysics simulation, modeling, and applications to develop loudspeakers and other audio products.

Hear and see! As TVs are made thinner and thinner, the loudspeakers inside the TVs need to be designed smaller and smaller to fit. This stands in direct contrast to the conventional wisdom that great sound requires large speakers. However, exceptional performance is just as important as minimal size. How does Samsung balance these needs? When developing a loudspeaker design, there are a few issues that can make or break the sound quality.

Being new to audio, Andri had to learn about audio engineering and acoustics before he could apply his simulation expertise to solve these issues. Has the sound of your loudspeaker ever sounded shrill, boomy, or tubby think of how it sounds if you hold an empty paper towel roll up to your mouth and speak? A good frequency response produces a neutral, flat, and more enjoyable sound. Have you ever watched a movie with a group of friends, and noticed how some people hear the television fine while others can hardly make out the dialog?

This is called the radiation pattern or spatial response of the speaker. Bezzola meets this challenge by using simulation to not only determine the design of a waveguide, but where it should be placed for optimal sound distribution. Nonlinearity in a loudspeaker can cause the sound to be too harsh and voices to sound raspy. Unfortunately, loudspeakers are inherently nonlinear.

When the voice coil moves inside of a loudspeaker, it interacts with a different magnetic field at every step and every position. To account for this behavior, a fully coupled magnetic simulation is needed. It sounds pun intended like a lot of work, but a well-balanced speaker provides a good sound with enveloping bass — an enjoyable listening experience. Bezzola likes to think of the loudspeaker design workflow like a baseball game. Analytical solutions get Samsung into the ballpark: They are a good start, but are only approximations, since they are only valid for perfect shapes.

Finally, optimization enables Samsung to hit the home run and beat the competition. We have electromagnets generating a magnetic field, coupled to a voice coil that moves a structural membrane, which in turn causes acoustic waves to propagate through space.

With multiple components and physics involved, Bezzola is often interested in multiple results parameters, looking at the acoustic response one day and the structural response the next. A successful multiphysics analysis is not the end of the development process. The Samsung Audio Lab has two anechoic chambers that the development team uses to test prototypes. The free-field chamber has foam wedges on all sides and is used to measure loudspeaker prototypes that are meant for almost any location away from walls, like a soundbar placed on a bookshelf or portable loudspeakers.

The other chamber has a solid wall on one side, which is used to mimic the environment of wall-mounted TVs. Left: A soundbar being tested in the free-field anechoic chamber. Right: The anechoic chamber with the solid wall is used to test loudspeakers meant to be mounted on walls. The anechoic chambers enable Bezzola to validate his simulation results, since both testing methods attempt to create idealized conditions. The chambers are also used to perform isolated analyses on a prototype and determine what effects are coming from the speaker versus the room.

Anechoic tests also determine how well a loudspeaker lights up a room with sound which is controlled by its waveguide component.

If you think of sound like light, then a loudspeaker can either be a light bulb or a flashlight. At low frequencies, a speaker will spread sound everywhere like the glow of a light bulb, it is said to be omnidirectional , while at high frequencies, the speaker spreads the sound in a narrow beam like a flashlight, it is said to have a high directivity.

Left: The sound pressure level SPL at a low frequency light bulb. Right: SPL at a high frequency flashlight. Over time, Bezzola recognized that transducer engineers on his team were repeatedly going to him for simulation analyses, and decided to do something about it. He used the Application Builder in COMSOL Multiphysics to build specialized simulation applications from his transducer models that the other engineers can use to run day-to-day calculations without having to go to Bezzola or wait for his help.

In the transducer applications, Bezzola only included a certain amount of buttons and inputs. This way, the engineers — most of whom do not have experience using traditional simulation software — only need to click a few preset items to get the results they need. Another benefit? Bezzola has more time to devote to new projects. The systematic approach used at Samsung to design loudspeakers, soundbars, and other audio products combines modeling, optimization, prototyping, and testing — and also combines the expertise and experience of the audio, mechanical, and simulation engineers.

Introducing simulation into the loudspeaker design workflow helped Samsung optimize their core group of products faster and cheaper than with prototyping alone. This consent may be withdrawn. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' or the latest version listed if standards is not an option. Log Out Log In Contact. July 29, Get New Posts by Email. Leave a Comment. Suggested Posts. Comments 0.

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Airlines ground dozens of Boeing 777 planes after engine failure over Denver

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The union for Air Canada flight attendants says the company is allowing flight attendants who don't want to fly on Boeing Max airplanes to be reassigned and the union says they want that option to continue. The Canadian Union of Public Employees issued a statement Tuesday asking the company to put the safety of passengers and crew first. Wesley Lesosky, the president of the union's Air Canada component, says the union is calling on Air Canada 'to at a minimum continue to offer reassignment to crew members who do not want to fly on this type of airplane.

Samsung Amps Up Loudspeaker Designs with Simulation

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The 10 most dangerous jobs in America

A mysterious North Korean aircraft stationed at China's Dalian airport was the subject of much speculation on 7 and 8 May. The plane was eventually confirmed to be that of leader Kim Jong-un, who it turned out was meeting Chinese President Xi Jinping in the coastal city. Mr Kim's increasing international engagement has given the wider world a view of how he travels, with each visit showcasing a different form of transport. Kim Jong-un's China visit this week marks his first confirmed international flight since assuming power, but media reports suggest he has previously used his private jet for travel within North Korea. The aircraft that flew him to China was a Soviet-made long-range aircraft, the Ilyushin Il

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