ultrasound microphone

Directsound capturing microphone PCM Data encapsulation class There are many ways to read PCM data from a microphone on the Internet. I just released a directsound microphone PCM Data Collection class I wrote here. Through this class, we can easily use directsound technology to collect

, the decibel value of the relative background noise is calculated. If the user does not correctly sound the microphone, the basic figure is 0 decibels. The background noise size of the user's actual scene varies widely. It's not right if we divert. Especially for those who make absolute decibel, should find the 20 micro-pa sound pressure corresponding amplitude (or can also take a standard decibel meter for calibration).Bloggers are more lazy, set th

This microphone is the protagonist of this tutorial. ~! a few days ago there is a lovely girl asked me this microphone inside the circle how to do, and then I am very diligent to run to find this material information, After a few geniuses to make a ~! now share it here! Note: This microphone is not my original, but the tutorial is I do, and this

Analysis of the reasons for the small replay sound after the microphone recording: 1, the microphone may be set to a lower volume 2, sound card driver installation is not correct The specific solution is as follows: 1, first mouse click on the Windows7 flagship system task bar on the small horn icon, and then select the "Recording equipment" item; 2, in the bounce out of the sound interface, swi

First, enter the Device Manager check the sound card driver is properly installed, if not properly installed can be the next Lenovo drive a key installation, use this tool can automatically help you find the appropriate host driver, and help you complete the drive download and installation. Second, check the microphone settings are correct For Windows XP systems 1. Using the right mouse button, click the Small horn icon in the lower right corner of

I recently bought a so-called 2 million-pixel camera, did not expect the first use of the problem. The camera connected to the computer, installed after the driver with the software test, the screen effect is not bad. To find Friends video chat, the other side said you can hear my side of the typing sound, but the murmur is very large. We know that if you want to sync your voice to your video, you must connect the microphone to the sound card and tur

1. Check if there is a problem with the Voice software : Through the system recorder function recording test, if the system Sound Recorder function is normal, then need to reinstall Voice software. Test the recording method using the system recorder:1. Click the Start menu in the lower-left corner of the screen. 2. Enter "Recorder" in the Search window and click the search result "recorder" appearing above, the following figure: 3. In the Open Recorder window, click "Start Recording". 4.

This paper refers to some information and discussion on the Internet, and expresses our thanks. Microphone array beamforming has been widely researched for wireless communication, speech recognition, speech enhancement, hearing aids and so on. Compared with other domain array processing, the microphone array processing has its own characteristics determined by the difficulties. This is due to the statistic

#import ...if ([[AVAudioSession sharedInstance] respondsToSelector:@selector(requestRecordPermission:)]) {[[AVAudioSession sharedInstance] performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) {if (granted) {// Microphone enabled codeNSLog(@"Microphone is enabled..");}else {// Microphone disabled codeNSLog(@"

In the network chat system, it is one of the most basic modules to collect the sound of the microphone and play it out. In this article, we describe how to implement this basic module quickly.I. Basic knowledgeThere are several professional terms related to sound capture and playback that must be understood first, otherwise, the subsequent introductions will not be expanded. Voice acquisition refers to the acquisition of audio data from the

"balance" will pop up a balance dialog box, where we can adjust the left and right sound,"forward" and "backward" as shown in the following figure. 8. Then we're going to "microphone volume" We click on the recording in the sound panel and then we right click on the microphone (you need to access the microphone before you can adjust the

Import flash. Events. activityevent;Import flash. Media. Microphone;VaR devicearray: array = microphone. names;// Name of all available sound Capture DevicesVaR mic: microphone = microphone. getmicrophone ();// Obtain the index value of the current microphoneMic. Gain = 60;// Micro