decibel chart

Basic knowledge The most familiar unit for measuring sound intensity is decibels (decibel, abbreviated to DB). This is an dimensionless relative unit , and the formula is as follows: The molecule is the measured sound pressure, the denominator is the reference value of the sound pressure (20 micro-PA, human can hear the minimum sound pressure). So in daily speaking, the sound intensity is how many decibels, is the default of a very small reference

dialog implementation of display recording sizepublic class Viocedomio {private Context mcontext; Private Alertdialog Dialog; Private Alertdialog.builder Adialogbuile; Private ImageView vioce_show; Public Viocedomio (Context mcontext) {this.mcontext=mcontext; } public void Showrecordingdialog () {adialogbuile = new Alertdialog.builder (Mcontext, R.style.theme_audiodialog ); Layoutinflater inflater = Layoutinflater.from (Mcontext); View view=inflater.infla

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

Meaning of DBUnitdb, or decibel, is a very common unit in the field of electronics. This unit is characterized by the use of logarithms to represent the original data. 1 shell = 10 db = 10dB = 10 times times PowerFor an amplifier,power Magnification Ap = ten lg (PO/PI)voltage Magnification Au = LG (UO/UI)current Magnification Ai = LG (IO/II)For example: amplifier magnification of 40dB, indicating that its voltage amplification is 100 times times, curr

To the users of Photoshop software for detailed analysis to share the design of a decibel detector button icon Production tutorial. Tutorial Sharing: Effect: We start with the creation of the background, and the size I use is 1000*800 pixels. Create a gradient fill adjustment layer, set as follows: Draw a 600*600 pixel circle, set the fill to 0, and add a bevel and emboss.

Tags: GPO same store style log PL/SQL things global unitDecibels, expressed in English, is decibel, is a measure of the number of two units of the same unit, mainly used to measure the sound intensity, commonly used in db.blocks, block, in the Baidu Encyclopedia, refers to the database of the smallest storage and processing units, including the block itself header information data or PL/SQL code. (In fact, this I do not understand, I am a copy paste ^

If the control volume of the player is cut to 0-100, the input value of the parameter in Idirectsoundbuffer::setvolume (LONG lvolume) is [ -10000,0][CPP]View Plaincopy Mysetvolume ( DWORD inputvolume) { double decibels; DWORD Dsvol; if (inputvolume==0) Dsvol = Dsbvolume_min; Else if (inputvolume>10000) Dsvol = Dsbvolume_max; Else { decibels = 20.0 * LOG10 ((double) inputvolume/100.0); Dsvol = (DWORD) (decibels * 100.0); } Pdsbuffer->setvolume (Dsvol); }

Introduction to open-source chart library MPAndroidChart-pie chart line chart Column chart, and chart mpandroidchart MPAndroidChart open-source chart library-pie chart

Equal Volume chart transaction volume bar chart of Wijmo financial chart series, equal volume chart of wijmo financial chart There are many types of Wijmo financial charts. We will introduce them one by one. We have introduced the average K-line

Use the Chart. js chart library to create a beautiful Response Form and Chart. js chart library form Basics Chart. js is an open-source HTML5-based Chart library that allows you to easily and easily draw beautiful charts. Main fea

Class imagereport {VaR $ X; // image size X axisVaR $ Y; // the Y axis of the image size.VaR $ R; // R value of the background colorVaR $ g; //... G.VaR $ B; //... B.VaR $ transparent; // whether transparent 1 or 0VaR $ image; // Image//-------------------VaR $ arraysplit; // specifies the symbol used to separate numeric values.VaR $ itemarray; // ValueVaR $ reporttype; // chart type. 1 is a vertical column, 2 is a horizontal column, and 3 is a line.V

Mpandroidchart Open Source Chart Library pie chart To introduce an icon open Source Library Mpandroidchart, it can not only on the Android device to draw a variety of statistical charts, but also can drag and zoom the chart operation, very flexible. Mpandroidchart also has a common chart type: line, pie, histogram, an

Average K-line charts brick charts of Wijmo financial chart series, wijmo financial charts The most exciting controls in history will be released in July 16, 2015-WijmoFinancial chartIts integrated design provides all the major financial charts for a single custom set, which is unique to other controls on the market. It is as lightweight as any other Wijmo control, and actually it is an application. We believe that you will soon fall in love with it

GRaphaelIs designed to help developers draw a variety of exquisite charts on the web page.JavascriptLibrary, based on powerfulRaphaelVector Graphics Library. You only need to write several lines of simple code to create exquisite bar charts, pie charts, point charts, and graphs. GRaphaelUse the SVG W3C recommendation standard andVMLAs the basis for creating images, it is a cross-browser vector graphics library. Currently, the supported browsers include Firefox 3.0 +, Safari 3.0 +, Chrome 5.0 +,

Android custom Statistical Chart (bar chart, line chart, pie chart) Recently, due to project requirements, I have studied some statistical charts. At the beginning, I read many blog posts, most of which reference third-party libraries. Although simple, Easy to use, but the function is too rigid and many requirements ca

GRaphaelIs designed to help developers draw a variety of exquisite charts on the web page.JavascriptLibrary, based on powerfulRaphaelVector Graphics Library. You only need to write several lines of simple code to create exquisite bar charts, pie charts, point charts, and graphs. GRaphaelUse the SVG W3C recommendation standard andVMLAs the basis for creating images, it is a cross-browser vector graphics library. Currently, the supported browsers include Firefox 3.0 +, Safari 3.0 +, Chrome 5.0 +,

Configuration and statistical charts of the PHP jpgraph Library: line chart, bar chart, pie chart, and jpgraph line chart Introduction to JpGraph JpGraph is an open-source PHP Statistical Chart generation library. It is built based on the PHP GD2 graphics library and encapsu

/** * Baidu Data Statistics Chart Echart PHP implementation class * * Original * @author:chenliujinOriginal address: 26-point Blog? (http://www.iamlintao.com/?p=3149)Baidu Statistical Chart Echarts PHP implementation class, support column chart, line chart, pie chart

In the previous article, we described how to use the chart control provided by Silverlight Toolkit to draw a columnar chart (Column,bar), which will continue today With the code created above, we can make the histogram appear to be pie, line, or scatter with little modification. Well, start today's text. First, we're going to create a new "Silverlight control" of a pie

recordif (Stringutil.isempty (starttime) stringutil.isempty (Endtime)) {Htmbasejobcheckrecords HBC = Htmbasejobcheckrecordsdaoimpl.get (Htmbasejobcheckrecords.class,long.parselong ( Checkrecorderid));if (hbc==null| | Hbc.getflchecktime () ==null) {return null;}Date enddate = Hbc.getflchecktime ();Calendar cal = Calendar.getinstance ();Cal.settime (EndDate);EndDate = Cal.gettime ();Cal.set (Calendar.date, Cal.get (calendar.date)-days);Date startdate = Cal.gettime ();SimpleDateFormat sdf=new Simp