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Reprint: The concept of sound decibel, DBSPL.DBFS

transferred from: https://www.cnblogs.com/wangguchangqing/p/5947659.htmlDecibel decibelDecibel (db) is a logarithmic unit (logarithmic unit), which is different from many common units such as "M", "SEC" or "kilogram", and it is not directly used to describe the size or amount of a physical quantity, it represents the ratio of two physical quantities of the same unit. Decibel is often used to describe sound, such as more than 50dB of noise will affect

Computer has a sound card device system shows no audio devices do?

Sometimes there is no sound in our computer, and when you click Start, the audio and Audio device Properties window is turned on from the control Panel, which is not available, and the "No Audio device" error message appears on the screen. The computer appears "no audio device" prompts, is generally due to the sound card is damaged, the sound card is

How does android implement SoundPool for playing sound effects in a short time?

method. Int resId, // resource ID Int priority // priority. Set this parameter to 1. ) 3. Playback sound effects: [Java] Int play ( Int soundID, // the ID of the music to be played Float leftVolume, // left audio volume Float rightVolume, // right audio volume Int priority, // priority, 0 is the lowest Int loop, // number of cycles. 0 indicates no loop, and-1 indicates permanent loop. Float rate // playback speed. The value ranges from 0.5 to 2.0, an

13 Faults of computer sound and their solutions

Now, the computer is no longer entirely our office tool, after work, we through it to watch movies, listen to songs and so on. But sometimes when listening to songs or watching movies, suddenly the computer did not sound, let us helpless, how to do? The Windows operating system is lost in many cases due to the sound card and its drivers, and in most cases we can choose to reinstall the

What's with the computer's no sound?

What's with the computer's no sound? Sometimes we find that the computer has lost its voice without knowing why, and wants to listen to a song or watch a TV, just can't make a sound? This is very annoying. So, what's wrong with losing your computer? Is there any way to get the computer's voice to appear quickly? Next, let's look at how to get the computer to sound

How to embed sound files in PowerPoint

In a slide, there are two ways to add sound, that is, inserting sounds and embedding sounds. inserting/linking sounds (files), deleting inserted/linked sounds (files) is simpler and more intuitive. Embedding sound files is a more complex method, but it is even more cumbersome to delete methods that have been embedded in sound files. The following is a detailed ap

The computer has no sound solution

Computer no sound is a very depressing thing, there is no sound problem computer, such as when the computer turned on without a sound, the task bar in the small horn disappeared, often make the rookie helpless, do not know how to be good. In the actual operation of the process, who will encounter similar problems, and friends have been made to sleep hard ann. It

Tone and sound quality training

I don't know which of the following is my dear friend's article. I copied it for fear of losing it. So I put it here and didn't find the original address. If I think it is infringing, please tell me the source in time. Many people recognize that the intensity and color of the audio domain are inherently natural and difficult to change. In fact, they do not know if they have heard of the "Swallow" training, -- this is an absolute "Martial Arts secret! There are many singing experts in today's mu

COCOS2DX Learning Path----11th (handling of sound)

This article will talk about the loading and playback of sound and so on.There are two sound engine options for the sound loading in the Cocos for our use. One is a relatively simple sound engine, while the other one is more complicated.Generally speaking, if we just want to play music

Clever use of PPT built-in sound to make presentation documents more vivid

This article introduces the method and technique of adding a PPT built-in sound selection to a friend who wants to use the sound effects to highlight PowerPoint presentation documents. At the end of the year, PPT will be a worthy protagonist in all kinds of year-end reports. Unfortunately, the PPT built-in sound only explosions, pumping, hammering so more than 1

Cocos2d-x background music and sound effects using examples _c language

Music and sound in the game are essential, good music can leave us a deep impression also determines the quality of the game. Today we'll learn how to use music and sound effects in cocos2d-x. The functions used are simpler and are now directly on the code. The header file for the sound pre-processing class #ifndef _audio_pretreat_h #define _AUDIO_PRETREA

Why is the headset microphone not sound?

Many friends will encounter the computer suddenly did not sound or reload the system after everything else is normal, is the stereo or headphones no sound problem. I'll explain in detail the various reasons why the computer doesn't sound, and in the later part of the article, I'll explain the microphone's sound problem

How do I reinstall my sound card driver?

One, the sound card installs Method One: 1. Right-click the computer--> Management--> Device Manager, as shown in figure: 2. Click Device Manager-will not find the sound device, but in other devices one by one have a bus audio device, right click on the device one by one click to update the driver software, as shown: 3. Select browse the computer to find the driver software, brow

The computer does not have the sound breakdown concrete processing method

System Configuration Issues 1. Double click on the taskbar's small horn icon, pop-up "Volume Control Window", the mouse click the "Options" tab------------Select Properties. 2. In the "show the following volume control" check "Volume Control" and "Wave Two options", click OK. 3. Left-click the computer Desktop taskbar volume icon to see whether the click to mute the volume to the minimum.  Determine if the hardware is the cause Check the computer sound

Common sense concepts such as sound, audio sampling rate, and Sampling Accuracy

What is sound? Energy Wave, with frequency and amplitude, the frequency level is the tone, the amplitude size is the volume, the sampling rate is the frequency sampling, and the sampling accuracy is the amplitude sampling The frequency range that people can hear is 200-20 kHz, What is codec? Audio Compression Co + extract Dec, codec is a multimedia digital signal decoder, mainly responsible for DAC and ADC. Whether the audio accelerator is

Doodle Voice Innovation sound card 5.1 settings

Take the old style innovation SB Live5.1 version For example (Innovation Other series sound card can also refer to Settings) 1. First install the hardware of the sound card this thing is inserted in the computer motherboard PC slot (and network card parallel to the 3 slots can) insert the method as shown: 2. Then plug in your mic and headphone microphone to plug in the middle of the pink hole,

How to install a sound card driver

As the operating system installation package continues to grow, such as Vista, the installation package has reached a few g, and the system's accompanying drive packs have become more comprehensive. Sometimes, when the system is installed, a lot of hardware can be used normally without installing the driver. But not all hardware can be installed without driver, for example, sometimes after installing the system, the sound card has not been successfull

A solution to the WIN8 system with no sound problems

You can follow the following three steps to troubleshoot problems. The first step: check the hardware Many sound problems are caused by incorrect hardware settings. This step includes checking the sound card, inserting the cable into the correct location, ensuring that the hardware is powered on and checking the volume. Check your sound card Check to make sur

Linux Problem solving _arch system installation is complete no sound

RtTheir machine is Lenovo y410p, before the installation of the arch system has been unable to play sound, and do not know how to set up, today, the computer configuration, incidentally, the sound of the problem solved.The Arch default kernel has been ALSA with a set of modules and does not have to be specifically installed.ALSA refer to the Arch website Wiki:https://wiki.archlinux.org/index.php/alsa_%e5%ae

How to set up a computer to use a dual sound system under Windows XP

How to set up a computer to use a dual sound system under Windows XP The steps are as follows: First of all, the following methods of setting up the two sound cards are used only in the case of Windows copy screen or extended screen. In the use of the second-part software (such as Aster or betwin) to do computer division behind the multiple sound card allocatio

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