The difference between Bluetooth 4.0 and Bluetooth 3.0

What’s Bluetooth

The difference between Bluetooth 4.0 and Bluetooth 3.0

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994 it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

More about What’s Bluetooth technology

Bluetooth Version

The Bluetooth specification was developed as a cable replacement in 1994, based on frequency-hopping spread spectrum technology. All versions of the Bluetooth standards are designed for downward compatibility, that makes the latest standard bluetooth cover all older versions.

• Bluetooth v1.0 and v1.0B
• Bluetooth v1.1
• Bluetooth v1.2
• Bluetooth v2.0 + EDR
• Bluetooth v2.1 + EDR
• Bluetooth v3.0 + HS
• Bluetooth v4.0
• Bluetooth v4.1

The difference between Bluetooth 4.0 and Bluetooth 3.0

The Bluetooth SIG completed the Bluetooth Core Specification version 3.0 on 21 April 2009 and Bluetooth 4.0(called Bluetooth Smart) and has been adopted as of 30 June 2010. The main difference between Bluetooth 4.0 and Bluetooth 3.0:

Bluetooth 4.0 upgraded from the Bluetooth 3.0 standard, Bluetooth 3.0 + HS specification supplement. Compared with Bluetooth 3.0, the most important features of Bluetooth 4.0 is Bluetooth low energy protocols technology, it’s aimed at very low power applications running off a coin cell for several years. In addition, Bluetooth 4.0 features also included: low-cost and cross-vendor interoperability, 3ms latency, ultra-long transmission over 100 meters and AES-128 encryption.

Wireless information can be exchanged in mobile phones, PDA, wireless headsets, laptops, related peripherals and other devices by Bluetooth technology.

By using Bluetooth technology, we can effectively streamline communication between mobile communication terminal equipment, even between the device and the Internet. Thus data transmission would be more rapid and efficient, wireless communication would be more easier.

Bluetooth uses a decentralized network and fast frequency hopping and short packet technology to support point to point(P2P) and multipoint communication service(MCS), working in the global generic 2.4GHz ISM (ie industrial, scientific, medical) frequency. The data rate is 1Mbps.

Bluetooth 3.0 provides theoretical data transfer speeds of up to 24 Mbit/s, though not over the Bluetooth link itself. Instead, the Bluetooth link is used for negotiation and establishment, and the high data rate traffic is carried over a collocated 802.11 link. The feature of Bluetooth 3.0 is AMP (Alternative MAC/PHY), the addition of 802.11 as a high speed transport, which allows Bluetooth protocol stack dynamically select the correct radio frequency for any task.

Bluetooth 4.0: upgrade of Bluetooth 3.0

The most important features of Bluetooth 4.0 is Bluetooth low energy protocols technology, it’s aimed at very low power applications running off a coin cell for several years. Other features like low-cost and cross-vendor interoperability, 3ms latency, ultra-long transmission over 100 meters and AES-128 encryption, could also be used in many fields pedometer, heart rate monitors, smart meters, sensors and other things, greatly expanding the range of applications of Bluetooth technology.

Bletooth 4.0 is downward compatibility designed, which includs classic Bluetooth specification and maximum speed of 24Mbps data transfer. Three technical specification may be used alone, also clould be run simultaneously.

Bluetooth 4.0 is now moving toward commercial, in the latest models of new ipad, MacBook Air, Moto Droid Razr and Taiwan ACER Series, ASUS series and new iPhone have been all applied on the Bluetooth 4.0 technology.

Bluetooth 4.0 Features

Specifically for radio programs on high cost and power requirements, can be widely used in health care, sports and fitness, home entertainment, security and other areas.

It supports two deployment options: dual mode and single mode.

In Dual-mode, low-power Bluetooth function is integrated in the existing classic Bluetooth controller, or reproduction classic Bluetooth (2.1 + EDR / 3.0 + HS) increase in low-power chip stack, the overall structure is essentially the same, Therefore, a limited increase in costs.

Single mode is designed for highly integrated and compact devices which use a lightweight Link Layer to provide ultra-low power standby mode operation, simple device restore and reliable multipoint data transmission, also allows networked sensors Bluetooth transmission in low-power Bluetooth arrange the order flow, as well as advanced energy-saving and secure encrypted connection.

Bluetooth 4.0 main features: low energy protocols, average and standby mode power consumption.

• Use a standard coin coin cell can run for a year or even several years with low power applications
• Low cost
• Interaction of different vendors’ equipment
• Enhanced wireless coverage
• Fully backward compatible

How to Change your cellphone Bluetooth Passcode

If you have a Bluetooth device then you know how much easier it makes using your gadgets, no cables to get tangled, no adapters to leave behind. The problem is that everyone these days seems to have a Bluetooth device, which means, unless you change the passcode, there is a chance that someone might accidentally pair your device with theirs.

Tips to Change your cellphone Bluetooth Passcode

• 1,Turn on the Bluetooth device whose passcode you wish to change and unpair your devices. This removes the connection between them so you can create a new one with a different passcode number. Do this by going to your “Main Menu,” then “Settings,” then “Bluetooth” and select “Unpair” by using the navigation button and click on “OK.”
• 2,Turn off the Bluetooth function in all of the devices you wish to create a new passcode for. This will differ from gadget to gadget, but most of them require you to go to the “Menu,” then “Settings,” then “Bluetooth” and then select “Off.” This will reset the connection so you can create a new passcode.
• 3,Turn the Bluetooth connections back on for the devices that you wish to pair and make them both “Discoverable.” While in the Bluetooth connection menu select “Add a New Device.” This will give you a list of available devices. Select the device you wish to add and select “Pair Devices.”
• 4,You will be prompted for a passcode; enter a four digit number you can remember and click “OK.” You will then get a message from the other device that you are trying to pair requesting a passcode. Enter the same four-digit code into it and click “OK.” Your Bluetooth devices are now paired with a different passcode.

what’s “water proof” really mean in bluetooth speaker?

“Water proof” and “water resistant” mean the same thing, right? The answer is false!!!

Once you understand the IP code, it’s not terribly difficult to tell what kind of protection an item has. IP, as you’d expect, indicates the standard, but the numbers aren’t necessarily sequential.

The first number after “IP” indicates the size of the foreign object from which the rated item is protected.

1. no protection against contact and ingress of objects
2. greater than 50mm, including any large surface of the body (i.e., the back of a hand), but no protection against deliberate contact with a body part (i.e., poking your finger where it doesn’t belong)
3. greater than 12.5mm; protection against fingers and objects of similar size
4. greater than 2.5 mm; protection against tools, thick wires, and objects of similar size
5. greater than 1 mm; protection against most wires, screws, and objects of similar size
6. protected against some dust; ingress of dust is not entirely prevented, but a lot of dust cannot enter, and that which does must not interfere with the satisfactory operation of the item
7. no ingress of dust

The second number (and possibly an additional letter) after “IP”  indicates the level of protection against harmful ingress of water.

DSC001240: no protection

1. vertically falling drops of water cannot cause any harmful effects (light rain)
2. dripping water cannot cause any harmful effects when the enclosure is tilted at an angle up to 15° from its normal position (moderate rain)
3. water falling as a spray at any angle up to 60° from the vertical shall have no harmful effects (spraying water)
4. water splashing against the enclosure from any direction shall have no harmful effects
5. water projected by a nozzle against the enclosure from any direction shall have no harmful effects (water jets)
6. water projected in powerful jets against the enclosure from any direction shall have no harmful effects (powerful water jets) 6K: water projected in powerful jets against the enclosure from any direction, under elevated pressure, shall have no harmful effects (powerful water jets with increased pressure)
   ingress of water in a harmful quantity shall not be possible when the enclosure is immersed in water (immersion up to 1m)
7. he equipment is suitable for continuous immersion in water (immersion beyond 1m)
8. 9K: protected against close-range, high pressure, high temperature spray (powerful, high temperature water jets)

Each of these ratings has a specific test associated with it which includes depth, pressure, and duration, to name a few.

Now that you’ve seen it all laid out, what looked like fairly similar ratings of IP54 and IP58 now are obviously very different.

Ultimately, there is no such thing as “water proof”, just varying degrees of “water resistance”. What most people would consider “water proof” would be at least an IP56, but IP57 and IP58 would be even better for what Mr. Poirier was trying to do.

How to Set Up Bluetooth Hands-Free speakerphone

A Bluetooth hands-free unit is a device that fits in your ear much like an earphone. These devices allows a cell phone user to talk on his phone without having to hold onto the phone. A Bluetooth hands-free unit will not automatically work with your cell phone. Before you can start using the Bluetooth, you will have to pair the unit with your cell phone. Setting up your Bluetooth will only take a few minutes and will give you the option of using your cell phone “hands free.”

How to Set Up Bluetooth Hands-Free

Instructions

• Plug in your Bluetooth hands-free device in order to charge the device. Leave the unit plugged in for roughly an hour so that it fully charges.

• Unplug the Bluetooth hands-free device.

• Press and hold the button found in the middle of the Bluetooth hands-free device. Do this until the light found on the middle of the Bluetooth stays on.

• Turn on your cell phone. Navigate to the Main Menu screen.

• Scroll to either “Settings” or “Settings & Tools.” Whichever you choose will depend on your particular cell phone.

• Search for a “Connectivity” option. If you find this option, highlight it and then press “OK.” Otherwise, skip to the next step.

• Choose “Bluetooth” or “Bluetooth Menu.” Press “OK” to go to the next screen.

• Select “Add New Device” and press “OK.” As you do this, place the Bluetooth hands-free device next to your cell phone. The phone will then search for the Bluetooth. When the Bluetooth is found, the name of the device will appear on the cell phone screen.

• Scroll down to the listed Bluetooth device and press “OK.” You will be asked to type in a code. Enter “0000” (four consecutive zeros) and press “OK.” Your Bluetooth hands-free device will then be paired with the cell phone and you will be able to use the device.

How to Play Music on an iPhone 3.0 Through Bluetooth

Bluetooth is a wireless technology standard for exchanging information between devices over short distances, conceived as a replacement for connecting cable for data transfers.

How to Play Music on an iPhone 3.0 Through Bluetooth

 

Although the iPhone is equipped with Bluetooth, it wasn’t until Apple released the 3.0 firmware update that many of its wireless features became available.

The A2DP Bluetooth protocol streams audio between a device and suitably equipped headsets or speakers, allowing users to play music stored on the iPhone without needing a physical connection to the music player.

Things You’ll Need

• A2DP-compatible music system

Instructions

• Follow the instructions for putting your Bluetooth music system into its discovery mode.
• On the iPhone, launch the “Settings” application and open the “General” menu. Tap the “Bluetooth” setting, and slide the “Bluetooth” switch to “On.” The iPhone will now automatically search for discoverable devices nearby.
• Tap the entry for the Bluetooth music system you want to connect the iPhone to. If the Bluetooth music system requires a passkey, check its instruction manual for the key and enter it into the iPhone application when prompted.
• Launch the iPhone’s “iPod” application, and tap a music track or playlist to begin playing. The audio will be routed automatically to the paired Bluetooth music system.

Tips & Warnings

Once the iPhone has been paired with a device and its passkey entered, they will subsequently connect whenever the devices are in range and Bluetooth is switched on.

How to Play Music Off an iPod Touch on a Bluetooth Wireless Speaker

The iPod Touch allows you to play music through a Bluetooth wireless speaker system connected to your device. The first time you connect your iPod Touch to the Bluetooth speaker system you need to complete the pairing or set-up process. Once connected, you can use the iPod application on your device to play music through the wireless speaker system.

How to Play Music Off an iPod Touch on a Bluetooth Wireless Speaker

Instructions to Play Music Off an iPod Touch on a Bluetooth Wireless Speaker

• Press and hold the Pairing button on your Bluetooth wireless speaker system. If you do not know where to find the Pairing button on your speaker system, consult your product’s user guide. Release the Pairing button once the indicator light on your speaker system starts to flash.

• Tap the “Settings” icon on your iPod Touch.

• Select the “General” option.

• Tap “Bluetooth” and move the “Bluetooth” switch to the “ON” position.

• Select the wireless speaker system from the list of Bluetooth devices.

• Enter “0000” when prompted to enter a passcode for the wireless speaker system. Your iPod Touch will connect to the speaker system and prompt you when the process completes.

• Press the home button on your iPod Touch.

• Tap the “iPod” icon and select the music you want to play. Tap the Play button to initiate playback of the music through the Bluetooth wireless speaker system.

How to transfer a call from the phone to Bluetooth Car Speakerphone

How to Make Calls by Voice Activation on a Car Bluetooth Speaker? When we’re in driving, using a hands-free Bluetooth system could improve safety.

Using a mobile phone while driving creates significant safety issues, especially when the driver is holding the phone. A Bluetooth-equipped phone allows you to use the phone hands-free. With the right equipment, you can make calls by voice activation on Bluetooth. The system allows you to dial a contact’s number without having to use your hands on the phone keypad. This means fewer distractions while driving and allows you to keep both hands on the steering wheel.

1. At first, you’ld have a Bluetooth Car Speakerphone such as U180 speakerphone.
   

   How to transfer a call from the phone to Bluetooth Car Speakerphone

2. Turn on your Bluetooth speaker for car.
3. Select the phone’s “Menu,” then choose “Bluetooth.” Turn on Bluetooth if it is not on. Click on “Search for new devices.” When the phone recognizes the speaker, highlight it and select “Connect.”
4. Confirm the connection with the speaker by clicking “OK” on the phone. This will connect the phone and the speaker.
5. Say the word “dial” while turning your head toward the speaker and say the phone number you wish to call. Speak each number clearly and loudly; do not include dashes or any other symbols. Wait for the phone to dial the number. When the other party answers, speak as with a normal phone conversation.

How to Configure Bluetooth Speaker for an iPad With Skype?

This method also works with the Skype app on the iPhone or iPod Touch.

Skype’s Voice over IP (VoIP) service is available on the iPad using the official Skype iOS application. By default, the Skype app uses the iPad’s built-in microphone and speaker for audio, but external headsets can also be connected that take precedence over the built-in audio hardware. Pairing the iPad with a Bluetooth headset prior to launching the Skype application will prompt the app to route its audio through your bluetooth speakers.

Tap the “Settings” button on your iPad’s “Home” screen, followed by the “General” button.

Tap the “Bluetooth” button, then slide the “Bluetooth” switch to “On.” The iPad automatically begins scanning for nearby Bluetooth devices.

Put your bluetooth speakers into their discoverable mode. When in discoverable mode, other Bluetooth devices — such as your iPad — can detect and connect to the speakers. Consult the instruction manual for your model of bluetooth speakers for details on how to enter discoverable mode.

Tap the entry for the bluetooth speakers in the “Devices” section of the iPad’s “Bluetooth” screen.

Enter the four-digit passcode on the iPad if requested. Consult the bluetooth speakers’ instruction manual for any factory default passcode required to connect them to Bluetooth devices. Not all bluetooth speakers will require a passcode to pair with another Bluetooth device; some may connect to the iPad automatically.

Press the “Home” button on the iPad to return to the “Home” screen.

Tap the “Skype” button to launch the Skype application. As long as the bluetooth speakers remain active and Bluetooth is switched on, Skype will automatically route the audio through your speakers.

Tips for Configuring Bluetooth Speaker for an iPad With Skype

Connect a wireless Bluetooth keyboard using the same method and use it to enter text in Skype’s text messaging function.

Only Bluetooth bluetooth speakers can be connected to the iPad. The iPad can’t connect to infrared bluetooth speakers.

How to Use iTunes With a Bluetooth speaker in computer

Bluetooth speaker allow you to listen to audio from your computer without having to be actually physically connected to it. The Bluetooth interface is a wireless connection method that enables devices from different manufacturers to communicate and share data with one another. Use iTunes with a Bluetooth speaker to listen to your favorite songs on your computer while cleaning or doing some other task away from your computer.

Example, if you have a MAC paired and a bluetooth speaker, you can Use iTunes With a Bluetooth speaker in following methods.

1, Put the bluetooth speaker in “on”, “Pairing” or “Discoverable” mode, just make sure your bluetooth speaker is ready for connection. This often involves pushing a multi-function button on the device, but check with the speaker’s user guide if you are unsure of the specific procedure.

2, Click “Start” and click “Control Panel.” in your computer.

3, Click “Add a Device” option that is found under the “Hardware And Sound” category in the “Control Panel” window that appears. Your computer will automatically search for available Bluetooth-compatible devices within 33 feet and open a list of located devices. Click the “Bluetooth Speaker” icon in the window and click “Next” to pair the speaker with your computer. The “Connecting the Device” message will appear in the bottom of the window.

4, Play a song on iTunes and the audio will automatically be sent to the headphones.

PS, if you have a windows installed PC, just try it as the same way, may it works~

What makes one bluetooth speaker better than another?

 

Speaker technology doesn’t seem complicated. Drivers push out sound waves. Those drivers are housed in an enclosure. There are some wires and parts holding everything together, too.

If you’ve listened to more than one set of speakers, you’ve likely discovered a known truth about the audio universe: Some speakers sound better than others. Even if you understand the underlying technology, it’s hard to explain why speaker X sounds better than speaker Y.

The sound quality of a speaker is the result of several elements materials, design, and execution and every detail matters in the final sound.

1. Driver

At the core of any speaker is the driver. Its frame serves as a mount for cones and coils used to convert signal to sound. Drivers made of materials such as ribbon or ceramic perform better than ones constructed from paper or plastic..

2. Crossovers

Circuits called crossovers create clarity in performance, but poorly designed ones actually hinder the signal and musical quality.

3. Cabinets

Heavier speaker enclosures indicate the amount of bracing and material that houses a speaker core. The shape of the enclosure such as rounded edges and cylinders leads to better frequency response and overall sound quality. Lighter speaker enclosures tend to vibrate or discolor sound.

4. Amplifier

After discussing the topic with speaker designers, I realized how complicated it can be to build a great-sounding set of speakers. Great sound is both a science and an art.

What makes a great speaker?

The best speakers recreate sound very accurately. In other words, they don’t color the sound by changing it. Ideally, you hear a sound: a trumpet run, a monologue, a gunshot: as it was intended by whoever recorded it. Unfortunately, no speaker is perfect, but the best ones come awfully close.

In theory, you can measure how faithfully a speaker reproduces sound. Frequency response charts the range of frequencies a speaker is capable of producing. You want a speaker that can produce as much of the full range of frequencies that human ears can hear as possible. (Some would argue, however, that you can’t actually measure how faithfully a speaker can reproduce sound, but only get a sense of how far from flat a speaker is.)

Frequency response isn’t the only factor to consider when you’re looking for a top-notch set of speakers. In order to understand the amount of color a speaker adds, the variations in the output of the speaker is as important as the range.

An example of a speaker with little variation in frequency response: a speaker that adds little color.

Every speaker produces certain frequencies that are louder or softer than others. Assuming that your ultimate goal is accurate audio reproduction, the less variation in loudness between frequencies: in other words, the flatter the frequency response chart is: the better the speaker quality. In a frequency response chart, you want to see a flat line instead of a line with peaks and valleys.

Given a perfect signal from an audio source and amplifier, variances from the ideal flat frequency response can often be attributed to the way a speaker is built.

Materials matter

When you compare speaker specifications, you’ll find that the cones found in each driver can be made out of different materials. You’ll see cones made out of paper, aluminum, polypropelene, or things like ceramic/glass fiber polymer. Why such variety in devices that do the same thing: Push the air to create sound waves?

To push air, most cones move in and out like a piston, but at certain frequencies, cones will flex instead. Flexing distorts the sound; by using more rigid materials, designers try to keep that flexing to a minimum.

Cone material is just one example of how materials can translate to a difference in sound quality. The materials used in everything from the wires to the glue in a speaker can impact the overall sound; every piece adds up to the entire sound output of a speaker, which is why speaker designers select each component carefully. For example, Gsou U180 adapts 16 core inside magnet driver to ensure a balanced and natural sound.

Sound designs

The materials used in a speaker are only part of the puzzle. The way those elements are assembled also affect the sound. Paul Barton compares it to cooking: You can put a bunch of chefs in the same kitchen with the same ingredients, but some chefs’ dishes will taste better than others.

Take the enclosure, for example. You need something to house the drivers and electronics that produce sound. If you don’t carefully design the enclosure, it will negatively affect the sound. If it is too wide, the sound can reverberate inside the cabinet, creating cross noise that interferes with the sound waves coming directly from the driver. If you don’t brace the driver securely enough, it can rattle and create distortion.

Gsou U200 bluetooth speaker has a narrow enclosure to minimize vibrations within the cabinet.

The crossover circuit is another key component in how a speaker sounds. In a speaker with more than one driver, the crossover(s) determine which frequencies are produced by which driver: for example, high frequencies (treble) are directed to a tweeter, with low frequencies (bass) directed to a woofer. Gsou compares the crossover circuit to the conductor of an orchestra, as different conductors will make the same orchestra sound completely different. In the same way, two speakers using the same drivers with different crossover settings will sound entirely different.

Every driver has a range of frequencies it can produce well, some it doesn’t produce as well, and others it can’t produce at all. A good speaker design uses a combination of drivers and crossover(s) to let each driver focus on those frequencies it can produce accurately.

Execution

Here’s what speaker sound comes down to: Picking the best materials you can afford and designing an enclosure that will maximize the sound quality. You put it all together, and then you test the resonance frequency: that at which the response amplitude is a relative maximum. But once you tweak all those components to get the numbers within the range you are comfortable with, you’re still not done.

At this point, you’ve got a solid foundation for a great speaker. But there’s another element of sound, one that Gross says nobody’s figured out to how measure for yet. That element is sound imaging.

Imaging is how the audio produced by speakers is interpreted by your brain to form a cohesive, well, image of the audio. If speakers image well, you don’t hear the individual speakers. Instead, you hear a full soundscape, with different instruments and voices apparently coming from different locations in front of you or to your sides. Imaging is the reason it can sound like a voice is coming from the middle of a speaker system when all you’re really hearing is a left channel and a right channel. To get imaging right, speaker designers have to listen to the production models and tweak them. It’s not something that can be done by looking at the specs alone. That’s part of the art of speaker design.

So, how can you determine how good a particular set of speakers will sound? In the end, you have to listen to know if a speaker is top-notch. Ideally, listen to the speakers in the setting in which you’ll use them to gauge the quality of their sound image. You can’t discount the personal element of sound: Speakers that sound good to you are good speakers, even if someone else may prefer a different set.

Source

1. http://en.wikipedia.org/wiki/Resonance_frequency
2. http://www.techhive.com/article/2000385/what-makes-one-speaker-better-than-another.html
3. http://www.gsoutech.com/new/201473014495.html