How does sound travel?

 

how sound travels

Ever wondered how sound travels?

People do not always stop to think about how sound travels, some might not even think that it travels at all. Perhaps they are more likely to think about how fast sound travels, or may be they do not think that sound trave!s. They may have worked out that sound does not travel as fast as light does. For instrance, people tend to be aware that the difference in speed is demonstrated by seeing lighting seconds before thunder been heard. Another example is an explosion been seen before the bang is heard. Yet none of these is showing an interest in how sound travels.

Working out how sound travels

It was a combination of engineers and scientists who between them worked out how sound travels. Several engineers and inventors like Bell, Marconi, and Tesla between them perfected radios and telephones that transmitted or relayed sound over long distances. Radio works by sending out radio waves from a transmitter to be picked by a receiver. The early developers of radio worked out that the frequency of radio waves could be alternated although none could travel faster than the speed of sound. Radio technology uses the same method of travel as sound and it usually sound that is transmitted to and from radios. Radio itself was developed for military and travel purposes before been used to provide entertainment.

Telephones, or at least the old fashioned types that used telephone lines turned sound waves into e!ectronic pulses, which are turned back into sound waves by the receivers at the other end. Cell phones work differently in that sound is transmitted in digital form, essentially as data instead of via waves or electronic impulses.

It goes in waves

Thus sound travel in waves. These waves travel at differing frequencies yet at a constant speed. It was Hertz that first demonstrated that sound travels in waves. Indeed the unit for measuring wavelengths is known as an Hertz in honor of him developing the measuring scale. Waves are the main way in, which sound travels though it can travel in other forms. As already mentioned sound can be recorded, stored electronically and digitally whilst also been transmitted in those forms.

The frequency that sound travels in determines how loud or low that sound is. For instance, some higher frequency sounds are too high to be heard by humans. Yet high frequencies can be heard by other animals such as bats, cats, and dogs. Bats who have really poor eyesight even use sound waves to navigate themselves around. Scientists even recreated the way bats use sound waves in sonar. The sonar technology was originally developed for naval warfare, primarily antisubmarine warfare. Yet sonar has also aided exploration and improved safety at sea. Sound waves, how they travel, and how they bounce back after hitting objects form the basis for radar too. Radar works by calculating what sound waves have bounced back from.

Yet for all the ways people have adopted the way sound travels to improve their lives perhaps the most impressive way sound travels is demonstrated by the sound of thunder.

Where To Place Speakers For A Home Surround Sound System

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In order to get the best possible experience from your home surround sound system, you will need to ensure that your speakers are located in optimum positions. Surround sound can be very impressive, especially when you are watching a movie but you may lose some of this effect if your speakers are not properly positioned. There are a number of things that you will need to take into consideration when you are planning where to place speakers for a home surround system.

All Rooms Are Different

No two rooms are the same and so the best place to position speakers will be different for everyone. This is one of the main reasons why it is so hard to find diagrams online that show exactly where they should be positioned. There are a number of things that can affect the sound that comes out from the speakers including the size of the room and its shape.  

Make A Clear Path  

The sound from the speakers will be best when it does not have to go around any other objects. You will need to ensure that every speaker has nothing in front of it that will block the sound waves. One way to get around this problem is to put the speakers on shelves as this can give them a clear pathway because they will usually be higher than any furniture or anything else that could get in their way.  

Take Acoustics Into Account

If you have bare walls or floors then these will create natural acoustics in your room and this will have to be factored in when you are deciding where to place speakers for a home surround sound system. You may get a more balanced sound if these bare areas of the room are minimized. When you listen to the sound that comes out of the speakers you will be able to make a decision regarding whether you need to change anything in the room such as adding a rug to the floor or hanging some pictures on the walls.  

You May Need To Experiment

If you are very lucky then the first place that you position your speakers will provide you with optimum sound and you will be all ready to go. However, this will probably not be the case and you may have to move things around a few times in order to find the best sound. Although this may sound like an inconvenience, it may not be as bad as you think and it probably won’t take you that long. It will be well worth it when you have the best possible sound coming from your speakers.  

The question of where to place speakers for a home surround sound system in order to get the best effects is one that will vary between homes because every situation is different. The above guidelines can help you to get things right but remember that you may need to try the speakers in a number of different positions before you get the best sound.

Do You Know the Specifics about Planar Speakers?

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What is a planar speaker?

A planar speaker, or planar transducer, is a boxless flat trapezoidal two-inch thick frame with a tight super strong and light diaphragm across it, like a tall trapezoidal drum head, with a series of powerful magnets arrayed in north and south rows suspended on a steel framework behind it. This sets up a magnetic field in an arc between the magnets, then a copper conductor attached to the diaphragm vibrates the diaphragm when a music source signal is passed through it. Planar speakers are in the same family as ribbon speakers and, electrostatic speakers. They are not at all like what you think of, when you think of high end audio loudspeakers. There are no woofers, tweeters, midranges, or crossover networks with resisitors, capacitors or inductors.

Why not build speakers in boxes?

The box is designed to muffle the back wave of the speaker–especially the bass notes, as they move the most air and are less directional than higher notes–by using wood products like MDF (medium density fiberboard) and acoustically absorbing batten, fiberglass, foam or loose weave rag wool to try to deaden the sound from the back wave. The back wave is a problem. The cone diameter is shorter than the wavelength, so you need a box or it cancels out much of the bass from the back wave. The box to try to contain it, is also a problem. (I have seen speaker boxes made out of granite! to try to ensure no resonance from the boxes. And they cost as much as a luxury car and you would need help to move them around your living room. And some others can be sand-filled!)

The back wave resonates in the box and is either kept in the box (acoustic suspension) or allowed to escape slowly after the initial impact (vented, ported). The box, if it resonates, will be heard. With the vented speakers, the delayed bass notes from the vents can be heard imparting a muddy boxy sound in the bass.

Planar transducers are dipolar. The back wave is the same as the front wave as it is a flat surface, not concave like a cone, or convex like a dome. As the diaphragm is much larger than the wavelength (378 square inches, equivalent to15 eight-inch woofers) it doesn’t need to be contained. As the box doesn’t exist, the back wave is not constricted, or muffled, it sends forth music freely 180 degrees, creating a natural ambience like heard in clubs and concert halls from live instruments and singers. Incidentally, dipolar speakers are the only types of speaker that are THX certified for surround channel speakers.

No cones or domes?

Paper, polypropylene, Kevlar, carbon fiber or aluminum cones are suspended in a pressed or forged metal basket; they have a flexible rubber surround to try to keep them perfectly centered; they have a “spider” that is intended to snap them back to where they started before they were given a signal to move. These cones, whatever they are made of, because of their shape, have to be thick and strong enough to try to prevent distortion from flex. And the better they handle trying to limit coloring of the music from flexing, the greater mass colors the music more by not being able to respond to transients as quickly and stop as quickly (ringing: vibrations from the driver after the music source impulse has stopped.) The design is a “Catch 22.”

Some high end audio speaker companies boast about their “long-throw cones.” Long-throw speakers should handle more power with less flex, and play louder. But the further they can move, the harder it is to control ringing. Whatever these cones are made of, they cannot respond as fast as planar diaphragms which have exponentially less mass, in fact, less mass than the air it moves. It responds to the source signal much faster, and it stops instantly.  The diaphragms vibrate like a piano string, guitar string, and give a faster impact like a drum head.

I can buy tiny cubes with a subwoofer that play amazingly loud for their size. Why are these planar transducers so tall and so thin?

Square inches. Bigger woofers can move air with less motion. A  planar’s diaphragm being equivalent to 15 eight-inch woofers hardly has to move at all to move the same volume of air. And the less it moves, the easier it is stop where it started. The diaphragm is taut on a frame and returns to the original starting position after the signal stops without needing a cone’s imperfect associated rubber surrounds and spiders and baskets to try to control them and keep them centered. And this is also the mid-range and tweeter. Most dome tweeters are ½ to 1 inch in diameter. This tweeter is 378 square inches. As the diaphragm produces the entire music spectrum from a single source, again, all 378 square inches, you don’t pinpoint the speaker drivers, but you can pinpoint the musicians on the stage instead.

And yes, some of those little cubes will play amazingly loud.  But turn the cubes down a notch or seven, and the detail, the ambience, the imaging, the naturalness disappear-if they were there in the first place. Loud music sounds sharper, because you are being blasted with it. Almost any speakers will play loud and sound initially impressive at high volumes. But over time, they become grating if they aren’t producing music accurately.

Many audio salesmen will play speakers at deafening levels, to impress you with their power and to make up for the lack of quality. Turn them down a notch or even six notches, and the planar transducers will not lose their crystal clearness, as will most conventional speakers, because they don’t have the lightning fast response of the planar speakers.

And many of these tiny speaker manufacturers cross over to the subwoofer at 200 Hz or even higher-much too high a crossover region to have the notes coming from the sub. A subwoofer should be a subwoofer and fill in only the extreme low end of the music spectrum. The cubes are basically midrange/tweeters with no bass. The cube systems produce too much of the midrange from the subwoofer, when the subwoofer should be just doing the, ah, subwoofin’. The hardest musical instrument to produce is the human voice. And a female’s voice is harder to produce to sound natural than a male’s voice. Examples of frequency ranges in music Crossovers in any range of the human voice are not the best way of producing music to sound natural.

Even many very expensive bookshelf monitor speakers cannot reproduce low down bass notes, so they deliberately peak the bass notes in the mid bass, and the result is all the bass notes sound the same without any range. The bass can still be tight sounding sometimes, but the bass notes are all of the one-note variety. Many high-end speakers also peak the treble to give you the impact and bright shimmer of the cymbals. But this puts the drummer in front of the singer, when the drummer is supposed to be behind the singer. Initially impressive, like a neon light, as opposed to a good photograph, but unnatural and this ruins the depth of the soundstage.

Why a trapezoid diaphragm?

Trapezoid shape prevents the planar diaphragm from imparting a physical resonance that isn’t in the music source, and it looks prettier than a rectangle.

Why a single driver speaker? No crossovers?

Crossovers from woofers to tweeters, and worse, in the midrange, boost part of the music spectrum and drop others. Because they are an intended impedance to the signal, they have to affect the smoothness of the signal. A typical three-way system projects the sound from three different points. And you ear picks this up as smearing, taking away from the natural imaging and soundstage.

Coming from 3 points, the sound is subtly smeared. Some speaker manufacturers use what is called a “D’apollito array.” This puts the tweeter, which is easier to pin point by the ear, vertically in the middle of two midrange or midrange/woofers. This is to try to limit vertical dispersion: secondary waves bouncing off the ceiling and floor. Vertical dispersion is what most betrays the size of your room and smears the music. You can tell where the walls and floor and ceiling are with your eyes closed.

And unless the cones and domes are staggered to be all in the same vertical plane, called time-aligned speakers, a tough thing to get perfect, as they are not perfectly flat as the woofer and midrange cones are concave (innies), and the tweeters are usually convex domes (outies), so the sounds reach you at slightly different times. This further smears the music as it reaches you from these different and separate point sources a few milliseconds apart, this time smear being detrimental to the front to back depth, the soundstage, the placement of the musicians on the stage, making the music less natural, less real, less live. With the Lightning Sound planar speakers, a piano can go from the highest notes to the lowest, with no crossovers in between, seamlessly. And a saxaphone sounds like a saxaphone, not like a New Year’s Eve horn.

The planar transducer sends sound from the whole panel. It is like comparing listening to sound coming from three separate doorknobs, as compared to it coming from the whole wall. There are no resistors, capacitors, or inductors. Plug in to the Lightning Sound planar speakers, and you are direct into the transducer wire. Lightning Sound planar speakers are purely resistive with extremely flat impedance of 7 ohms across the entire frequency range, which is safe for all amplifiers.

Doesn’t a tweeter have to be small to produce high-end notes?

No. A tweeter has to respond very fast. The less mass, the better. Cones or domes have to be small because of the weight. But with Lightning Sound’s transducers, the diaphragm is lighter, in fact has less mass than the air it moves. For the entire music spectrum, not just the high notes, it can respond quickly and accurately, producing more realistic high-end music than can a dome or a cone, without any sibilance (hissing) and this from every square 378 inches of the diaphragm. You hear uniform, seamless production of the music without any peaking or smearing of the subtle overtones.

What about surround sound?

Many high-end speaker manufacturers are making bipolar or dipolar speakers for their back channels, so that you cannot pinpoint the rear channel speaker, and are now starting to build them for their front channels. You will get better spaciousness, ambience and depth. They know what planar loudspeaker builders have known for quite some time. We have been testing center channel designs and when we are satisfied with the one best design from a sound perspective, we will offer them.

If planar speaker drivers are better, why don’t more companies build them?

Higher labor costs. Just as car manufacturers build very few, if any, of the parts in their cars, they commission this business to other manufacturers that produce the parts for them as to their specifications, and then assemble the pieces on their assembly lines. Speaker manufacturers, for the most part, do the same. They build boxes, buy cone and dome drivers from manufacturers that are in business to produce cones and domes, buy or build their crossover networks and assemble them on assembly lines. In fact, as there are many more speaker builders than there are cone and dome driver manufacturers, many speaker manufacturers use the same cone and dome drivers, as do their competitors. And a few of them buy planar drivers and slap their name on them. And many don’t even build the boxes or framework. This is quicker, easier, and more profitable for them.

Use Bluetooth Speakers to Keep Your Party Going

gallery-1445964511-bose-soundlink-mini-bluetooth-speaker-iiWhen you are putting on a party of any kind, you want to make sure that your guests enjoy the party fully. You want to do all that you can in order to bring your guest enjoyment. It is important for you to have a variety of entertainment options available to your guests and for you to put in the effort that you need to in order to make sure that everyone is having fun. You will find that Bluetooth speakers can help you when you are looking to keep your guests entertained and when you are looking to make your party be as fun as possible.

Through the help that Bluetooth speakers offer, you will be able to bring about a certain feel at your party. If you are looking to get everyone dancing, you can turn on the latest pop hits. If you are looking to keep things calm, you can play classical music. No matter what you are looking for in regard to music, you will find that Bluet
soundblaster_roar2-2-970-80ooth speakers can help you to keep your party going in a good way. You will find that having speakers available will help you to keep all of your guests entertained as the party goes on.

When you are looking to have music playing at your party, you want to have a way of easily controlling that music and of keeping it playing in a good way. It is important for you to have the opportunity to switch up the music whenever you want to and to change the volume of that music. You will find that using loud Bluetooth speakers will provide you with the control that you are seeking in regard to your music. When you use such speakers, you will be able to control the music that is playing in a remote way.

It is important for you to do all that you can in order to make your party into all that it should be. You should use music to make your party fun and exciting. When you have access to Bluetooth speakers, you will be able to play music at your event and you will be able to use that music to keep everyone entertained. The right speakers will provide you with the chance to make your party into all that it should be. When you have good speakers around, you will be able to blast all of your favorite music and keep everyone happy.

Lil Bit Info About Bluetooth Speakers

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Bluetooth was officially invented in the year 1994 as another option or a replacement for certain cables. However, the idea of Bluetooth was around before then in other forms of media. In 1984 the movie ‘Beverly Hills Cop‘ very briefly touched on a device that Eddie Murphy’s character used for communication. And no one can forget the green bullet in Ray Bradbury’s 1953 novel ‘Fahrenheit 451‘; a small machine that sits in Guy Montag’s ear and helps him keep in touch with Professor Faber, like walkie-talkies. Since then, it’s evolved into an every day thing; it’s in just about every smart phone, electronic radio systems installed in cars, and now you even can buy Bluetooth speakers under $100.

Everyone likes music to a certain degree, but younger generations always have deeper or more passionate connections it than older ones. A lot of kids are teased by adults for being on their phones all the time, but actually, in most film and television shows, teenagers are depicted with either head phones on or earbuds in.FVNZWEKHOUFRWY7.MEDIUM

Bluetooth speakers give people a chance to listen to their music on the go without the hassle of cords or other plug ins. If there’s nothing on the radio while you’re travelling, just pull out the speaker, connect a device to it via wireless, and there you go, instant tunes. These are especially popular with high school and college age people; a sense of independence shows with wireless speakers, like carrying around a guitar case used to stand for.

It’s also nice if you’re having parties or get togethers with family/friends. Having the Bluetooth speakers on a table by the pool are safer and easier to access than a radio or stereo system; no electrical cords or outlets to watch out for and since it’s music from a phone or other device, choosing a song is quicker and more efficient. Barbecue’s are great places for them too; they’re small and portable so they don’t take up much space and can be moved to a different location to make more room very easily.94_ihomeiA100iphonefrontangle_1288890373

These are also a great idea for car rides and children; having them each take a turn choosing a song they want to listen to can help keep arguments to a minimum and just might make the time go by faster. Road trips in general were most likely the first thing thought about with these speakers because of their versatility, compact-ability and accessibility, the passenger turned DJ has no problem putting on music everyone will like. Plus, they’re battery operated so there’s not worry about needing to bring along a charger or making sure you can plug it in on the go.

How Is Music A Very Valuable Thing To Us All?

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Music is far more than just a means of entertainment.
It is a truly wonderful gift and blessing for many to express themselves emotionally and in any way that does make them happy or content overall. Music has many meanings and definitions to us all. Therefore, it goes far beyond being just lyrics with words, or a singer sharing a popular tune on stage that many do simply adore in a major way. The value of music is something that is priceless in delivery and for its very own reasons. You cannot put a price tag on its worth. Because, to be honest, it is priceless in description and what it can do for all of us as people.

How is music a very valuable thing to us all? The answers here may vary, based solely on each person’s reactions, and just how music does indeed influence his or her life in some particular way. Music has many benefits. A lot of its benefits are something that are beneficial, as well as, crucial to all those everywhere. Music gives us all satisfaction that lives inside the heart, soul, and mind. keep-calm-and-love-music-3679It’s not all about something that is pleasing to the ears. It is something that is able to promote a genuine smile and happines that can only be felt on the inside of a person.

As a part of society, and in society, we value the written word as being a pure and creative artistic form. However, if the very same could be said, and it is. Music is also every inch the same, as is, the written word. It is something that is highly praised and appreciated at the very same time. In schools, children are exposed to various works of fiction, as well as nonfiction with the glorious written word. Music appreciation is also something that should be started early on. Just like kids get exposure to the written word, they also, do need to be exposed to music and its history in the world. Music is indeed every inch wonderful, valuable, and something that we should hold dear to our hearts and ears.

Beethoven was one composer who did inspire a lot of people to write songs. The power of music is a universal force and presence that everyone does indeed appreciate a lot. It is far more than just a pastime, a diversion, and something sweet to listen to. Music is a powerhouse of wonder and a creative force that influences us all to greatness.

Does Music Have The Power To Reduce Stress?

Music-reduce-stressMusic has been called many things. However, one of the most rewarding of all things, which it does give to people is very clear and obvious. What is that? It is no other than the power to ease the mind, bring comfort, and make for an overall peaceful feeling that puts one into a very good mood. Therefore, with all of this said, the question remains. Does music have the power to reduce stress? The answer is a resounding yes. Music has many powers and the kind of power it has in definition is all good for those who listen to it regularly.

Music has managed to establish a very solid reputation for itself. What is this reputation? The reputation is no other than being a valid source for a soothing power like no other. What does this hqdefault (2)mean? It means what it means. Music is something that is linked to our emotions in a natural kind of way. It is this link, which does help it, to assist us the most when we are feeling upset, angry, depressed, or in some other negative state. Music is a very powerful stress reduction tool and always has been. There is no other definition that best defines it than this.

Music isn’t only able to attract our attention. It also has the uncanny ability to act as a distraction as well. The combination of absorbing our attention, in addition to, serving as a very real means of distraction only does outline what was said here in detail. Music can, and will, make a person feel better.

Music preference is very much a matter of personal preference. Some people like certain types of music such as rock, pop, or classical. However, at the very same time, there are others who like a whole group of various types of music together. Therefore, the music is within each of us, and it is truly something that we appreciate and love in our own unique kind of ways. Music does far more than just lessen stress. It is a tangible thing. What does this mean? It means that it has the power of immense touch. Music doesn’t only touch our emotions.

It also touches our lives in a big way too. Music is very popular and it is also a viable part of culture in every way too. Everything we do, as well as express, does involve all aspects of music that do promote happiness.635838196179845910-2136094209_relaxing-music-slider1

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