barcode printing using vb.net Sound power in terms of decibels in Software

Make Quick Response Code in Software Sound power in terms of decibels

Sound power in terms of decibels
QR-Code Decoder In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Creating QR-Code In None
Using Barcode printer for Software Control to generate, create QR-Code image in Software applications.
The above formula can be worked inside-out, so that you can determine the final sound power, given the initial sound power and the decibel change. Suppose the initial sound power is P, and the change in decibels is dB. Let Q be the final sound power. Then Q = P antilog (dB/10). As an example, suppose the initial power, P, is 10 W, and the change is 3 dB. Then the final power, Q, is Q = 10 antilog ( 3/10) = 10 0.5 = 5 W.
QR Code Scanner In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
QR Code Creation In C#
Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
Decibels in real life
Denso QR Bar Code Encoder In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
QR Code Drawer In .NET Framework
Using Barcode maker for .NET Control to generate, create QR-Code image in VS .NET applications.
A typical volume control potentiometer might have a resistance range such that you can adjust the level over about plus/minus 80 dB. The audio taper ensures that the decibel increase or decrease is a straightforward function of the rotation of the shaft. Sound levels are sometimes specified in decibels relative to the threshold of hearing, or the lowest possible volume a person can detect in a quiet room, assuming their hearing is normal. This threshold is assigned the value 0 dB. Other sound levels can then be quantified, as a number of decibels such as 30 dB or 75 dB.
QR Code 2d Barcode Generator In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create QR Code image in .NET applications.
Create GTIN - 128 In None
Using Barcode encoder for Software Control to generate, create UCC - 12 image in Software applications.
The rheostat 109 If a certain noise is given a loudness of 30 dB, it means it s 30 dB above the threshold of hearing, or 1,000 times as loud as the quietest detectable noise. A noise at 60 dB is 1,000,000 times as powerful as the threshold of hearing. Sound level meters are used to determine the dB levels of various noises and acoustic environments. A typical conversation might be at a level of about 70 dB. This is 10,000,000 times the threshold of hearing, in terms of actual sound power. The roar of the crowd at a rock concert might be 90 dB, or 1,000,000,000 times the threshold of hearing. A sound at 100 dB, typical of the music at a large rock concert, is 10,000,000,000 times as loud, in terms of power, as a sound at the threshold of hearing. If you are sitting in the front row, and if it s a loud band, your ears might get wallopped with peaks of 110 dB. That is 100 billion times the minimum sound power you can detect in a quiet room.
Making Code128 In None
Using Barcode maker for Software Control to generate, create Code 128 Code Set C image in Software applications.
Generate Code 3/9 In None
Using Barcode creator for Software Control to generate, create USS Code 39 image in Software applications.
The rheostat
Data Matrix 2d Barcode Generator In None
Using Barcode maker for Software Control to generate, create Data Matrix image in Software applications.
EAN-13 Supplement 5 Printer In None
Using Barcode encoder for Software Control to generate, create GS1 - 13 image in Software applications.
A variable resistor can be made from a wirewound element, rather than a solid strip of material. This is called a rheostat. A rheostat can have either a rotary control or a sliding control. This depends on whether the nichrome wire is wound around a doughnut-shaped form (toroid) or a cylindrical form (solenoid). Rheostats always have inductance, as well as resistance. They share the advantages and disadvantages of fixed wirewound resistors. A rheostat is not continuously adjustable, as a potentiometer is. This is because the movable contact slides along from turn to turn of the wire coil. The smallest possible increment is the resistance in one turn of the coil. The rheostat resistance therefore adjusts in a series of little jumps. Rheostats are used in high-voltage, high-power applications. A good example is in a variable-voltage power supply. This kind of supply uses a transformer that steps up the voltage from the 117-V utility mains, and diodes to change the ac to dc. The rheostat can be placed between the utility outlet and the transformer (Fig. 6-11). This results in a variable voltage at the power-supply output. A potentiometer would be destroyed instantly in this application.
USS Codabar Creation In None
Using Barcode printer for Software Control to generate, create Uniform Symbology Specification Codabar image in Software applications.
Print Code-39 In Java
Using Barcode encoder for BIRT Control to generate, create USS Code 39 image in BIRT reports applications.
6-11
GS1 DataBar Generation In Java
Using Barcode generator for Java Control to generate, create GS1 RSS image in Java applications.
Generating USS-128 In Java
Using Barcode printer for Java Control to generate, create EAN 128 image in Java applications.
Connection of a rheostat in a variable-voltage power supply.
Print Code39 In .NET
Using Barcode generator for .NET framework Control to generate, create Code-39 image in VS .NET applications.
1D Generation In .NET Framework
Using Barcode printer for Visual Studio .NET Control to generate, create 1D image in VS .NET applications.
110 Resistors
Barcode Printer In None
Using Barcode generator for Font Control to generate, create barcode image in Font applications.
Reading ECC200 In C#.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
Resistor values
In theory, a resistor can have any value from the lowest possible (such as a shaft of solid silver) to the highest (open air). In practice, it is unusual to find resistors with values less than about 0.1 , or more than about 100 M . Resistors are manufactured in standard values that might at first seem rather odd to you. The standard numbers are 1.0, 1.2, 1.5,1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8, and 8.2. Units are commonly made with values derived from these values, multiplied by some power of 10. Thus, you will see units of 47 , 180 , 6.8 K , or 18 M , but not 380 or 650 K . Maybe you ve wondered at some of the resistor values that have been used in problems and quiz questions in previous chapters. Now you know that these choices weren t totally arbitrary; they were picked to represent values you might find in real circuits. In addition to the above values, there are others that are used for resistors made with greater precision, or tighter tolerance. These are power-of-10 multiples of 1.1, 1.3, 1. 6, 2.0, 2.4, 3.0, 3.6, 4.3, 5.1, 6.2, 7.5, and 9.1. You don t have to memorize these numbers. They ll become familiar enough over time, as you work with electrical and electronic circuits.
Copyright © OnBarcode.com . All rights reserved.