Many of the smartphones we see on the market nowadays would have the option of enabling a virtual assistant. You've definitely heard about Siri, Cortana, or Alexa, but maybe you really don't know what they are, what they're capable of doing, and what they're doing in the field of email marketing. While the primary method of using these tools remains touch, the voice has become part of the communication between humans and computers. And this capability is going to be much more important in the future.

Through integrating mobile computers, application programming interfaces, and the explosion of mobile apps, virtual assistant technology succeeds. While it was developed for military use, like almost all, this technology is present in our everyday lives nowadays, becoming a marketing sensation in 2018. Not only is it set to be used with the voice of the user, but you can also communicate in writing or by photos through this program, which means that this form of software provides infinite possibilities.

 

So how can we be supported by a virtual assistant?

• We can get details about anything from this kind of tool.

• It can warn us about the weather or the traffic situation in our area, in addition to reading the news.

• The music you want to listen to, the shows and movies you want to watch, read audiobooks, ETC, will be played by any interactive assistants.

• All you need to do is say the order, and the robotic assistant is going to do what you told them to do.

• Some programs, such as Siri, allowing you to send messages using WhatsApp, automatically set your alarm for the time you want to wake up, generate screen brightness enhancement alerts, and even disable Wi-Fi.

• There are many roles for Virtual Assistants, but the vast majority of them are undefined.

Major virtual Assistants

Alexa and Cortana

The VDA embedded in the Windows operating system is Cortana, and the virtual assistant created by Amazon is Alexa. Today, they have teamed up to create robotic assistants for the next generation. The opportunity to order from Amazon from Cortana would be one of the benefits of this technology. This would be possible because orders for this platform will be purchased and handled by Alexa. Also, by telling Cortana to enable Alexa, you can use various third-party resources. But it isn't like that. Cortana can be reached via the Amazon Virtual Assistant and assists in calendar maintenance or reminders.

In brief, two amazing brands that come together to make things easy for you.

Siri  

Siri is probably the market's finest VDA. Maybe that's because it was the most used by consumers in the past, but the rivalry with Apple is fierce now. Siri is made even more human by the current method. His voice is simpler, and what we are doing can be more understood, because we can communicate with it more effectively. Siri tells us about the news, recommends music, writes emails, translates sentences into other languages, in addition to configuring passwords, sending messages to WhatsApp, ordering a pizza. To make your life simpler, it offers many services.

Google Assistant

The Google Assistant is very different from the previous three systems. It is not as “human” as the others, but it has many features. One of its great advantages is that it is not only embedded in devices with Android, you can also download the application for iOS, or use it for Chrome. With this VDA you can also visit online stores and restaurants, or register your searches to suggest some recommendations in the future. The software understands any common language and is capable of answering complex questions. Also, with the new update, you can create alerts about the prices of flights.

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Increasingly, high-end smartphones sport blazing-fast 90Hz and even 120Hz refresh rate screens. On paper, this looks amazing. It's yet another way in which smartphones strive to separate themselves from each other. But can you purchase a phone because of this new trend in display technology? It depends frankly.

The advantages of phones with a high refresh rate and even how they function are rarely well known. Although games and content can look much better, it depends a lot on the customer and the smartphone whether it's worth the extra battery usage. With all that insight, here's what you need to learn about refresh rates.

 

What is Refresh Rate?

The refresh rate is a measure of the number of times a screen redraws an image. In basic terms, a higher refresh rate means less motion blur and a much smoother picture of the picture. Most smartphones today are packed, regardless of the price, with 60Hz displays. It is measured in Hertz. A 60Hz screen refreshes 60 times per second, 90Hz is 90 times per second, and 120Hz is 120 times per second. So a screen of 120 Hz refreshes twice as fast as a screen of 60 Hz, and 4x faster than an old 30 Hz Television.

The screens aren't static. On the screen of your phone, text and motion look seamless since each pixel changes to show the new content from the processor of your smartphone. But this doesn't happen spontaneously. At frequent intervals, known as the refresh rate, panels change their content.

Faster upgrade times often result in lower lag, as the pixels are updated more regularly. For comparison, a 60Hz screen takes 16.6 ms to completely refresh, 11.1ms for 90Hz, and only 8.3ms for a 120Hz rate. The refresh rate is not the only component in the latency of the round-trip display, but it is the main contributor.

Not all 120Hz smartphone displays are produced in the same way, which is why

Your smartphone's screen doesn't refresh all at once per period though. Instead, before the entire monitor changes at the appropriate rate, each horizontal row of pixels refreshes in turn. When you record a screen in slow motion, you can see this in effect and it's the reason why screens flicker if you view them through the viewfinder of your mobile camera. In other words, the display is continually updated and loading, but it takes time for one full update to complete the loop.

 

Should I get a phone with a high refresh rate?

In modern smartphones, especially in the premium market, 90Hz and 120Hz displays are increasingly popular. In inexpensive mid-tier handsets as well, the role is also increasingly available.

That being said, a small part of the display specs of a smartphone is the refresh rate. It's obviously not a big enough attribute to focus the whole purchase on. Ultimately, factors such as color gamut, contrast, white temperature, and resolution have an equally significant effect on the screen output of your phone.

 

If you still have your heart fixed on a higher refresh rate, here are only a couple of the best 90Hz or 120Hz displays for rocking phones:

Samsung Galaxy S20 5G – 120Hz display

OnePlus 7T – 90Hz display

Realme X50 Pro 5G – 90Hz display

Asus ROG Phone 2 – 120Hz display

Google Pixel 4 XL – 90Hz display

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What is a Solid-State Drive (SSD)?

The new generation of storage units used in computers is a solid-state drive (SSD). By using flash-based memory, which is considerably faster, SSDs replace conventional mechanical hard disks. Older systems for hard disk storage run slower, which also makes the machine run slower than it should. Thanks to their low read-access times and high throughputs, SSDs considerably speed up computers.

Why You Should Really Buy a Laptop With an SSD?

You're not going to own a brand new vehicle with a Ford Model T engine. Then why would you integrate a laptop that uses an older style hard drive into the knowledge superhighway? If you want a fast, sensitive notebook, why don't you need a solid-state drive? (SSD).

The disk drive of a laptop is infinitely more critical than other elements, including its CPU, RAM, and graphics chip, when it comes to overall performance. Your processor is clicking its fingers waiting for data to load from the disk while you boot the device, launch programs, and turn between tasks. Your OS and applications use virtual memory (also known as swap files) in the background, even though you don't access files, move data, or start apps.

 

SSD in laptop

Hard-disk drives use a spindle with a technology that dates back to the 1950s that flies over a spinning magnetic platter grabbing data like an old-school record-player needle drawing sound from a vinyl LP.

Here's why you need an SSD or let's say some benefits of SSD on laptops.

 

Performance Improvements

Because there are no moving parts in a solid-state drive, it is able to read and write data exponentially faster than a hard drive. When you boot your laptop or open a program, the real-world difference is more apparent.
 

Timing for opening apps

It almost goes without mentioning that, with an SSD, copying files is exponentially easier. Models with SSDs copied files at an average rate of 237.8 megabytes per second from laptops, whereas those with hard drives averaged just 33.9 MBps

Durability and Life of the Battery

SSDs, since they don't have to control any moving components, often consume less power than hard drives. In the Laptop Battery Survey, which includes continuous browsing over Wi-Fi, the average SSD-enabled laptop was benchmarked, it lasted 7 hours and 9 minutes. The average time for hard drive-powered laptops was just 5 hours and 43 minutes.

 

Storage

SSD-containing laptops typically have just 128 GB or 256 GB of capacity, which is adequate for all your programs and a reasonable amount of knowledge. Users that have loads of challenging games or large libraries of media, though, may want to save any files in the cloud or install an external hard drive. Many gaming and workstation-class laptops, having a fast SSD and a spacious hard drive, offer the best of both worlds.

A minor hassle may be the lack of storage, but the increase in speed is worth the trade-off. 256GB is a lot more affordable than 128GB if you can possibly handle it.

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Sensitivity is how an earphone transforms an electrical signal into an acoustical signal efficiently. Sensitivity means how noisy the earphones from the source can be for a given amount. This calculation is given in Sound Pressure Level decibels per milliwatt, or dB SPL/mW. It could be seen as dB/mW in some instances and is based on a 1 mW input signal. One mW, or 0.001 Watts, is one-thousandth of a watt.

 A defined headphone's loudness is directly related to its impedance and sensitivity.

When learning about a headphone's sensitivity, since they are co-related, you can also consider the impedance.

Headphone impedance defines how much electrical resistance a headphone provides to an audio source's signal. A headphone that has an impedance ranging from 20-40 Ohms would make a fair option for a casual audience.

High-impedance headphones are less sensitive and can sound louder when used with the phones in the build amplifier. For this purpose, to drive and get better sound, higher impedance headphones would take more power.

Sensitivity Range

Earphone sensitivity is typically in the 80 to 125 dB SPL/mW range. An example is here. The sensitivity of one earphone is 122 dB SPL/mW. This means 122 dB SPL would be generated by 1 mW of electricity. This amount of SPL is above the pain threshold and can inflict lasting hearing loss within a brief period of time.

Level of Sound Intensity (SPL)

Measured in decibels (dB), it is the sound frequency that humans can detect and perceive a sound, while the human ear is not similarly receptive to sounds at the same level of sound intensity except at different frequencies (20Hz to 20kHz).

In the world of headphones, to create a high sound pressure level, most headphones won't require more than 1 milliwatt of electricity.

SPL output level

There is no linear sum of dB SPL; 2 mW in the earphone does not produce 244 dB SPL. Doubling the input power or halving it raises or reduces the SPL by 3 dB. 119 dB SPL will be produced from a .5 mW input into the earphone. A sensitivity level doesn't mean much unless it is balanced by an audio system's output capability. Using a low-sensitivity earphone will result in low SPL if a device has low-performance values. Due to amplifier clipping, increasing the amplifier frequency in this setup can lead to noisy audio.

Sensitivity Lower vs. Higher

We humans most commonly listen to a frequency of between 60 and 80dB, and 90dB for the audacious among us. Most headphones have a sensitivity level of around 100dB on average.

It ensures improved driver output without using too much power when a headphone is claimed to have higher sensitivity. Using a high sensitivity headset at high speeds, though, can also inflict harm to the drivers of the headphones and the ears. The sound may even get blurred at high levels, depending on the headset.

Headphones with low sensitivity are the opposite of headphones with high sensitivity. While they need more driving strength, these kinds of headphones are more reliable than those with greater sensitivity. This is because they do not harm the driver machine, except though supplied with more power.

In order to get better sound reproduction with lower sensitivity headphones, a high power supply system (headphone amplifier) would be needed.

So, is sensitivity an essential factor to look out for in a headphone?

Yes, it is! 

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