question: Some smartphones are even faster than PC’s nowadays. Why do smartphones make no sound while being used, but PC’s make "working" sounds.
comment: The "working" sounds on a PC are either the disk drives, or the fans. Without the fans whirring your PC would catch fire/smolder/die pretty quickly and disk drives (especially standard ones) are cheaper so they go into a computer. As for "some smartphones are faster" you have to look at the big picture. A smartphone out of the box usually can't match a PC of the same price for high intensity usage. For example: pubg (I'm sorry) can be played on PC and mobile but the graphic quality and responsiveness of the game on PC is light-years ahead of a smartphone of similar age. That PC could also go on to transition into rendering 3D Mechanical drawings for massive projects whereas the smartphones components would literally burn up. Phones don't have fans to cool them off so instead they throttle power when they get hot. That's why the phone can start feeling buggy if it's warm. Their big advantage is that they use only a "solid" form of storage so the reaction could be faster for simple uses.
passages: Sound Blaster X7
  
  The Sound Blaster X7 is a USB audio device that can work without a computer. It was announced on 3 September 2014. It supports Microsoft Windows and Mac OS X computers but requires a power supply to work. The Sound Blaster X7 has the SB-Axx1 sound chip built-in. Android and iOS devices can change SBX Pro Studio audio settings with the Sound Blaster X7 Control app.
  
  Settings are also saved into the X7 after changes are made with the Sound Blaster X7 Control app.
   Some users have reported a strange hissing noise during heavy usage of the phone. "CNET" reports it as "faint buzzes and hums coming from the backside". "The Daily Telegraph" speculates that the iPhone 7's new A10 Fusion processor is the source of the noise, linking to tweets that compare the phone's hissing sound to "hearing the fans spin up loudly whenever your Mac’s CPU gets used to its actual potential." The issue has been referred to as Hissgate.
  
  Section::::Issues.:Performance differences.
   The major downside of using softsynths can often be more latency (delay between playing the note and hearing the corresponding sound). Decreasing latency requires increasing the demand on the computer's processor. When the soft synthesizer is running as a plug-in for a host sequencer, both the soft synth and the sequencer are competing for processor time. Multi-processor computers can handle this better than single-processor computers. As the processor becomes overloaded, sonic artifacts such as "clicks" and "pops" can be heard during performance or playback. When the processor becomes completely overloaded, the host sequencer or computer can lock up or crash. Increasing buffer size helps, but also increases latency. However modern professional audio interfaces can frequently operate with extremely low latency, so in recent years this has become much less of a problem than in the early days of computer music.
   The Apple M7, M8, M9, M10, M11, and M12 coprocessors collect, process, and store sensor data even if the device is asleep, and applications can retrieve data when the device is powered up again. This reduces power draw of the device and saves battery life. In addition to servicing the accelerometer, gyroscope, compass, and in M8 and later coprocessors, barometer, the M9 coprocessor can recognize Siri voice commands from the built in microphones of the device.
   Boundaries that separate these categories are blurry at times. For example, the OQO UMPC is also a PDA-sized tablet PC; the Apple eMate had the clamshell form factor of a laptop, but ran PDA software. The HP Omnibook line of laptops included some devices small more enough to be called ultra mobile PCs. The hardware of the Nokia 770 internet tablet is essentially the same as that of a PDA such as the Zaurus 6000; the only reason it's not called a PDA is that it does not have PIM software. On the other hand, both the 770 and the Zaurus can run some desktop Linux software, usually with modifications.
   Section::::Compatible devices.:Flagship smartphones and tablets.:Galaxy Note.
  
  BULLET::::- Samsung Galaxy Note
  
  BULLET::::- Samsung Galaxy Note 2
  
  BULLET::::- Samsung Galaxy Note 3
  
  BULLET::::- Samsung Galaxy Note 4
  
  BULLET::::- Samsung Galaxy Note Edge
  
  BULLET::::- Samsung Galaxy Note 5
  
  BULLET::::- Samsung Galaxy Note FE
  
  BULLET::::- Samsung Galaxy Note 8.0
  
  BULLET::::- Samsung Galaxy Note 10.1
  
  Section::::Compatible devices.:Mid-range smartphones and tablets.
  
  Section::::Compatible devices.:Mid-range smartphones and tablets.:Galaxy A.
  
  BULLET::::- Samsung Galaxy A3 (2015, 2016 and 2017)
  
  BULLET::::- Samsung Galaxy A5 (2015, 2016 and 2017)
  
  BULLET::::- Samsung Galaxy A7 (2015, 2016 and 2017)
  
  BULLET::::- Samsung Galaxy A8 (2015, 2016 and 2018)
   Computers can use software to generate sounds, which are then passed through a digital-to-analog converter (DAC) to a power amplifier and loudspeaker system. The number of sounds that can be played simultaneously (the polyphony) is dependent on the power of the computer's CPU, as are the sample rate and bit depth of playback, which directly affect the quality of the sound. Synthesizers implemented in software are subject to timing issues that are not present with hardware instruments, whose dedicated operating systems are not subject to interruption from background tasks as desktop operating systems are. These timing issues can cause synchronization problems, and clicks and pops when sample playback is interrupted. Software synthesizers also exhibit a noticeable delay known as latency in their sound generation, because computers use an audio buffer that delays playback and disrupts MIDI timing.
   A VoIP phone or application may have many features an analog phone doesn't support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers, or easy sharing of contact lists among multiple accounts. Generally the features of VoIP phones follow those of Skype and other PC-based phone services, which have richer feature sets but (because they rely on mainstream operating systems' IP support) latency-related audio problems.
   Direct recording of mobile phone calls requires a hardware adapter connected to the handset. There are many other ways to record mobile phone calls. One approach is to route calls via a new PBX system linked to the recorder. However, such systems are typically expensive to purchase and change the way that calls are made, incurring running costs. Another approach links directly into existing recording systems from a PDA phone. Both of these approaches allow recordings to be timestamped, often required for legal reasons. Recording directly onto mobile devices does provide a legally valid recording in many countries.
  
  Section::::See also.
   Though standards do exist for measuring and reporting sound power output by such things as computer components, they are often ignored. Many manufacturers do not give sound power measurements. Some report sound pressure measurements, but those that do often do not specify how sound pressure measurements were taken. Even such basic information as measurement distance is rarely reported. Without knowing how it was measured, it is not possible to verify these claims, and comparisons between such measurements (e.g. for product selection) are meaningless. Comparative reviews, which test several devices under the same conditions, are more useful, but even then, an average sound pressure level is only one factor in determining which components will be perceived as quieter.
   A proposed general definition is that the sound emitted by such PCs should not exceed 30 dB, but in addition to the average sound pressure level, the frequency spectrum and dynamics of the sound are important in determining if the sound of the computer is noticed. Sounds with a smooth frequency spectrum (lacking audible tonal peaks), and little temporal variation are less likely to be noticed. The character and amount of other noise in the environment also affects how much sound will be noticed or masked, so a computer may be quiet with relation to a particular environment or set of users.
   This model also suffers from a whine on the headphone and microphone jacks that are located on the left of the unit. This is because of shared space with the leftmost fan, and the spinning of said fan causes interference. There is no known fix than to otherwise use a USB, FireWire/1394 or PCMCIA-based audio device or card for sound output.
  
  Section::::Tablets.
  
  Section::::Tablets.:XPS 10.
  
  The XPS 10 was an ARM-based convertible tablet with a keyboard stand, running Windows RT, similar to the Microsoft Surface. The tablet was unveiled on August 30, 2012 and discontinued in September 2013.
  
  Section::::Special Editions.
   This process can work well, but there are two core problems. First, the process often requires the user to manually connect to the SoftAP network, which can be confusing for mainstream users. Second, if the user enters the passkey incorrectly, or if the phone gets disconnected from the SoftAP network for any reason, it is difficult for the app and device to smoothly recover, so the user is often left having to factory reset the device and start over. Third, different phones (hardware and OS versions) handle SoftAP differently, so the user experience varies dramatically -- especially with the wide variety of Android hardware and software. 
   BULLET::::- Speech recognition Google introduced voice input in Android 2.1 in 2009 and voice actions in 2.2 in 2010, with up to five languages (now around 40). Siri was introduced as a system-wide personal assistant on the iPhone 4S in 2011 and now supports nearly 20 languages. In both cases, the voice input is sent to central servers to perform general speech recognition and thus requires a network connection for more than simple commands.
  
  BULLET::::- Near field communication with other compatible devices including ISO/IEC 14443 RFID tags.
  
  Section::::Software.
  
  Section::::Software.:Operating system.
   Feature phones run on proprietary firmware with third-party software support through platforms such as Java ME or BREW. The proprietary operating systems were not designed in mind to develop nor handle the intensive applications found on iOS and Android, both of which specifically cater to third-party application development which became increasingly important.
   Section::::Hardware.
  
  Section::::Hardware.:Central processing unit.
  
  Smartphones have central processing units (CPUs), similar to those in computers, but optimised to operate in low power environments.
  
  The performance of mobile CPU depends not only on the clock rate (generally given in multiples of hertz) but also on the memory hierarchy. Because of these challenges, the performance of mobile phone CPUs is often more appropriately given by scores derived from various standardized tests to measure the real effective performance in commonly used applications.
  
  Section::::Hardware.:Display.
   Section::::Development.:Additional Software.
  
  Due to the professional design of VY2, the vocal often appears in use for apps and equipment that involves derivative products produced by YAMAHA, either on its own or with VY1. However, unlike VY1, VY2 is often added as an additional vocal or an alternative one and has yet to head a product using their vocals.
  
  In October it was released for the iVocaloid iOS app. VY2 was due for release on VocaloWitter in the summer of 2011 and VY2's version would have adjusted the VY1 version for compatibility and performance reasons. However, it has never been released.
   BULLET::::- Samsung Smart TV had a Skype app, which could be downloaded for free. It used the built-in camera and microphone for the newer models. Alternatively, a separate mountable Skype camera with built-in speakers and microphones is available to purchase for older models. This functionality has now been disabled along with any other "TV Based" Skype clients.
   BULLET::::- Sony Xperia M35t (VoLTE)
  
  BULLET::::- Sony Xperia miro
  
  BULLET::::- Sony Xperia P
  
  BULLET::::- Sony Xperia S
  
  BULLET::::- Sony Xperia Sola
  
  BULLET::::- Sony Xperia SP
  
  BULLET::::- Sony Xperia T
  
  BULLET::::- Sony Xperia Tipo
  
  BULLET::::- Sony Xperia Tipo Dual
  
  BULLET::::- Sony Xperia U
  
  BULLET::::- Sony Xperia V
  
  BULLET::::- Sony Xperia XA
  
  BULLET::::- Sony Xperia Z
  
  BULLET::::- Sony Xperia ZL
  
  BULLET::::- Sony Xperia ZR
  
  BULLET::::- Sony Xperia Z1
  
  BULLET::::- Sony Xperia Z1S (T Mobile US only)
  
  BULLET::::- Sony Xperia Xz2
  
  BULLET::::- Sony Xperia Xz-f8331
  
  BULLET::::- Sony Xperia Z1 Compact LTE-A
  
  BULLET::::- Sony Xperia Z2 LTE-A D6543/D6503
  
  BULLET::::- Sony Xperia Z3
   Despite being based on the cross-platform XULRunner, TomTom Home lacks support for Linux (and most probably it won't ever support, as the NAV2 devices are mostly legacy models by now). It is, for instance, impossible to update the maps in these devices by connecting them to another machine running Linux, even when using a common web browser like Firefox that normally allowed such an update under Microsoft Windows. 
  
  However, the devices can still be read in a Linux OS as a disk drive. There is even software made by the community to manage some functions of
  
  the TomTom.
   Android applications run in a sandbox, an isolated area of the system that does not have access to the rest of the system's resources, unless access permissions are explicitly granted by the user when the application is installed, however this may not be possible for pre-installed apps. It is not possible, for example, to turn off the microphone access of the pre-installed camera app without disabling the camera completely. This is valid also in Android versions 7 and 8.
   Some users have noted that ambient noise can be a problem. The built-in microphone on the pen can pick up small amounts of noise from writing on paper, and adjacent ambient noise is often louder than a far away speaker. However, the included headphones have embedded microphones that reduce this ambient noise. (Headphones for the Echo must be purchased separately).
   Hardphones (a.k.a. VoIP phone) are smart devices, they are more a computer than a phone, and as such they need to be well configured. The Chinese manufacturers, in some cases are using default passwords for each of the manufactured devices leading to vulnerabilities.
  
  Section::::Vulnerabilities.:VOIP over WiFi.
  
  VoIP even while VoIP is relatively secure in 2017, it still needs a source of internet, which in most cases is WIFI network. And while a home/office WIFI can be relatively secure, using public or shared networks will further compromise the connection.
  
  Section::::VOIP exploits.
  
  Section::::VOIP exploits.:VoIP spam.
   Softphones are client devices for making and receiving voice and video calls over the IP network with the standard functions of most "original" telephones and usually allow integration with VoIP phones and USB phones instead of using a computer's microphone and speakers (or headset). Most softphone clients run on the open Session Initiation Protocol (SIP) supporting various codecs. Skype runs on a closed proprietary networking protocol but additional business telephone system (PBX) software can allow a SIP based telephone system to connect to the Skype network. "Online chat" programs now also incorporate voice and video communications.
   The Defy CPU/GPU is TI OMAP3 architecture OMAP3630 and the PowerVR SGX530. The OMAP 3 is the industry's first 45-nm CMOS processor set at 800 MHz in ARM Cortex-A8 superscalar microprocessor core. Under-clocked CPU frequencies (below ARM manufacturer specs of 1 GHz) & high CPU voltage levels on the stock phone led to much lower performance and battery life on stock settings than the hardware is capable of. This can be modified on rooted phones, using 3rd party tools (e.g. SetVSel app) or custom ROMs, with stable performance over 1 GHz being common.
  
presuppositions: Because some smartphones have similar capabilities to computers they should also make sounds similar to computers during use.
corrections: While smartphones can do things similar to computers, they cannot execute the same processes at the same quality or speed, therefore the fans and cooling systems that create sounds in computers are not included in smartphones, smartphones do however become sluggish when overheated. 
raw_presuppositions: Because some smartphones have similar capabilities to computers they should also make sounds similar to computers during use. Smartphones are on par with PC's, or even faster.
raw_corrections: While smartphones can do things similar to computers, they cannot execute the same processes at the same quality or speed, therefore the fans and cooling systems that create sounds in computers are not included in smartphones, smartphones do however become sluggish when overheated.  In the big picture, a smartphone usually can't match a PC of the same price for high intensity usage.