Posts Tagged ‘between’

The Difference Between Sound Proofing and Sound Treatment

Despite what the salesman at your local A/V shop tells you, sound proofing and sound treatment are not interchangeable terms in acoustics. Sound proofing is the process of creating a space that prevents any form of sound from escaping it, while sound treatment is the manipulation of a room’s response to particular frequencies to create a balanced sound within the room. Although there are similar materials for both procedures, their expected outcomes and processes are nonetheless very different.

Sound proofing a room

If you’re creating a space that will be used to contain a huge amount of sound and noise (like a death metal band’s rehearsal space), the best way to do this would be to build a room within a room. The room itself should have a thick cement floor, walls and ceiling. This forms an outer shell which is the space’s last line of sound proofing, and must be dense enough to absorb even the loudest low frequency sounds.

Within it, another room must be made whose walls, ceiling and floor (ideally) may be made of cement as well to ensure maximum density. Drywalls filled with sheetrock or fiberglass can also be used. This inner room must be smaller than the outer room and is generally placed in the middle of it, allowing for a space between them where the resultant escaping sound is trapped even more. This ensures that only a minimum of sound meets the walls of the outer room, thus increasing the chances of a 100% sound proofed room.

Treating a room

Treating a room requires less material than sound proofing it, but requires more patience and knowledge as there will be frequent listening tests and adjustments to be made in order to create a tailor-fit sound. There are three ways to treat a room, either by sound absorption, reflection or diffusion.

Sound absorption is important in an acoustically treated room/studio because it eliminates standing waves and early reflections from surfaces. Taming these undesirable sounds also creates a clearer and more precise stereo image, as in the case of a mix engineer’s suite. Sound absorption is achieved through the placement of porous material such as cloth and fiberglass in strategic areas. These act as traps that absorb high and mid frequencies, and are generally placed around the room and on the ceiling. To trap low frequencies, denser absorbers (called bass traps) are placed in locations that form corners, such as between walls and in spaces where the room’s wall’s meet the ceiling.

Diffusion serves to scatter sound hitting its surface in random directions. Though less ubiquitous than absorbers and reflectors, diffusers serve an important purpose of preventing redundant travel of sound waves. Diffusers are generally crafted with a mathematical model as a guide to ensure the randomness of its surface. Once sound arrives on the face of the diffuser, it is distributed in an arbitrary manner.

The next time you decide to create a quality listening space, define first whether or not you would like to sound proof it, treat it, or even both. Knowing what you would want to do ahead will save you energy and money by letting you focus on what would be the priorities for your acoustic project.

Emics is a leading laboratory providing calibration and Inspection services

Be the first to comment - What do you think?  Posted by admin - February 18, 2010 at 7:28 am

Categories: Audio   Tags: , , , ,

Sound Effects Libraries | What is the Difference Between Them?

When looking at sound effects libraries, there are a few key differentiators. You will especially want to know the difference between sound effects libraries if you want to ensure a high quality production. Not all sound FX libraries come in the same style or quality! Here are a few of the most critical things you should look for in sound FX libraries.

Firstly, the recording quality in sound FX libraries are probably one of the most critical deciphering factors. Traditional sound FX libraries will come with 16 bit / 44.1 kHz recorded sound effects. If you have a half decent audio card on your workstation you will want to go with the 16 bit version. If you are serious about your sound design, there are many sound FX libraries that today are being offered in 24 bit / 48 kHz with some being offered in a high definition 24 bit / 96 kHz format. Cutting edge sound effects libraries are being pushed to be delivered in 24 bit  / 96 kHz format, while at the same time providing other compatible versions of the sound effects on the same library (such as 16 bit) which allow you to choose whatever format you might need.

Another deciphering item is the actual saved file format the sound effects are saved in. When sound effects libraries are offered in MP3 format they diminish the quality of the original recording (few are). Most sound effects libraries are offered in a WAV format and are of much higher quality then MP3s (and therefore much larger files). This is still a large reason why sound effects libraries still take up multiple CDs or whole hard drives when you purchase them.

Next, if you want to seriously consider the full effect of sound effects libraries, one should consider surround sound. Surround sound FX libraries are created in true 5.1 Dolby Surround Sound, the audio standard for surround sound productions.  Surround sound adds realism and depth to your production, placing the viewer or listener and making them feel like they are in the middle of your production. Surround sound FX can be especially effective when creating ambiences and background sound effects.

Finally, it’s important to consider the search tools for indexing your sound FX libraries. Often search tools are provided and come along with sound effects libraries. Common search tools people use that they might already have are Pro Tools, AVID, Sound miner, Net mix and others. While all of these are great tools, one of the easiest tools you already have is ITunes. You already likely use it to index a lot of your music, why not your sound effects? Whatever you use, just make sure you’ve thought this through ahead of time and make sure the indexing of your sound FX library is compatible with your search tool.

In summary, when picking sound FX libraries, make sure they are the quality you want, the appropriate file format, decide on whether you want surround sound effects, and finally make sure you can index them and find them when you need them!

The Sound Effects Shop is one of the largest Sound Effects Libraries which have a collection of professional sound effects and royalty free music for post production, broadcast and motion picture industries. Sound FX Libraries are the ultimate resource of podcasting and sound design for commercial use.

Be the first to comment - What do you think?  Posted by admin - February 8, 2010 at 12:00 am

Categories: Audio   Tags: , , , , ,

Differences Between Plasma and LCD Tvs

Plasma and LCD panels may look similar, but the flat screen and thin profile is where the similarities end. There are a number of significant differences between the two.

Let us understand the meaning of Plasma and LCD Televisions in order to better understand the differences between them.


LCD TV uses LCD technology for its visual output. Liquid Crystal Display or LCD is a thin, flat display device made up of a number of color or monochrome pixels arrayed infront of a light source or reflector. In color LCDs each individual pixel is divided into three cells or subpixels which are colored red, green and blue. Each cell or subpixel can be controlled independently to yield thousands or millions of possible colors for each pixel. LCD TVs can make for excellent High Definition TV viewing.

LCD TVs – The Good

1. Excellent Color Reproduction – LCDs can display millions of colors accurately.

2. Multi-functional – LCD TVs have a plethora of connectivity options. They typically include inputs for composite video, S-video, High Definition Multimedia Interface(HDMI) and PC In.

3. No Burn In – With LCDs there is no problem of Burn In. Some TVs that rely on phosphors such as Plasmas and CRTs can experience Burn In where ghost images are permanently burned into the screen.

4. Inherently Progressive – LCDs use millions of tiny transistors that can be individually controlled by the “brains” inside the display. So LCDs can easily handle progressive-scan sources.

5. High Resolution – LCDs can display High Definition content with resolutions of 1366×768. The highest resolution achieved in a LCD is 1920×1080. 1080p is also called Full High Definition whereas 720p is called High Definition.

LCD TVs – The Bad

1. Expensive – LCD TVs are great but they are not cheap. LCD TVs cost more per inch than plasmas.

2. Poor Reproduction of Blacks – LCD TVs tend to produce grays, not blacks.

3. Limited Viewing Angle – LCDs have typically poor viewing angle. However, there has been a drastic improvement on this front with latest LCDs achieving a wide viewing angle of 178 degrees.

4. Slow Response Time – LCDs have longer response times than Plasmas.For example, when moving the mouse too fast on an LCD, multiple cursors can sometimes be seen. This is also known as Ghosting Effect. But this problem seems to have been addressed with the latest LCD TVs with response times as low as 8ms.

5. Low Contrast Ratio – Contrast Ratio is the ratio of the intensity of the brightest bright to the darkest dark. LCDs comparitively have lower Contrast Ratios than Plasmas.


A plasma screen contains literally millions of gas-filled cells (each one acting as a single image pixel) trapped between two pieces of glass. An electrical grid zaps these cells and causes the gases to ionize (and ionized gas is plasma – hence the name). The ionized gases, in turn, cause a layer of phosphor on the viewer’s side layer of glass to light up. Plasma TVs combine a thin, compact chassis with a truly large screen size. Despite their compact dimensions Plasmas are available in 42+, 50+ and even 60+ inch sizes.

Plasma TVs – The Good

1. Excellent Brightness – Plasma TVs don’t rely on a light bulb shining through or reflecting off of something (as an LCD or DLP system does). Plasma brightness is even better than CRT’s in some ways because the picture is evenly bright across the entire screen.

2. High Resolution – The finest plasma TVs have such high resolutions (and such smooth images) that they look life like.

3. Progressive in nature – All the pixels on the screen light up simultaneously. You can have progressive HDTV sources (such as 720p) and non-HDTV sources (such as progressive-scan DVD players) displayed to full advantage on a plasma HDTV.

4. Wide Viewing Angle – Plasmas have a wider viewing angle as compared to LCDs. Plasma displays have a good picture even when you’re sitting “off axis” (not perpendicular to the screen surface). This is a huge benefit for smaller rooms, where viewers may sit relatively far off to the sides of the screen, at wider angles.

Plasma TVs – The Bad

1. Burn-In – Plasmas rely on phosphor to display video. This can cause Burn-In where ghost images are permanently burned into the screen.

2. Short Lifespan – Another phenomenon of any phosphor-based display system is that eventually the phosphors “wear out” or lose their brightness. This is a subtle and slow process, but it inevitably happens.

3. Less-than-perfect color reproduction – Although plasma displays can produce a breathtaking array of colors, a lot of sets have the unfortunate tendency to make red colors look more orange than true red.

4. Poor reproduction of black – Plasma TVs fall short in the realm of reproducing black images. Most plasmas do slightly better job than LCD TVs at black reproduction, but they fall short of CRTs and some projection systems.

Other factors such as pricing, weight, power usage, high altitude performance and transportation are other considerations that apply on a person to person basis. So I will briefly just state the overall differences in these areas.

Pricing: Plasma TVs are still significantly less expensive than LCD in sizes over 32″.

Weight: LCD TVs are considerably lighter and as such easier to mount and install. So

Johnny Waymire has a great free resource site, , containing practical and helpful information on how to purchase Flat Panel TVs that fit YOUR needs. Visit to find all the helps, brands and reviews to make your next purchase very informative.

Be the first to comment - What do you think?  Posted by admin - January 23, 2010 at 7:40 pm

Categories: Video   Tags: , ,

video converter-convert various video/audio in between

 video converter is a classic collection of all the excellent programs for video conversion of the world today. It delivery the ultimate solutions for the troubled people who desire a magic tool that can be used to convert one video to many others at will. It is just more than your can imagine, it also allows users to extract audio track, take snapshot from videos. With the customizable settings function, you can get more artistic effect form the converted video. Just email your friends the processed music, video or pictures as a gift or a symbol of greeting, share your achievement with your friends from today now. The iOrgsoft video converter is simply the right choice for all your needs.

The supported output formats and mobile devices:

1. Video
Convert Video: AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, RMVB, VOB, ASF, 3GP, 3G2, SWF, H.263, H.264, DV
To video: AVI, MPEG, WMV, MP4, FLV, H.264/MPEG-4, DivX, XviD, MOV, ASF, 3GP, 3G2, SWF, VOB,

2. Audio
Convert audio: MP3, WMA, AAC, WAV, FLAC,M4A, AC3, MP2 Format
To audio: MP3, WMA, AAC, WAV, FLAC,M4A, AC3, MP2 Format

3. Image

4. Mobile devices:
iPod, iPhone, iPhone 3G, Apple TV, PSP, BlackBerry, Creative Zen, iriver, Zune etc.

Solution: What’s the BEST of the iOrgsoft  video converter ?

the iOrgsoft video converter provide solutions to every specific problem in a very effective way, that means when you get it, you save troubles to buy many other conversion tool. this just the one for all plan.

Convert Video/audio between Almost Any Formats

 Video to Flash MPEG converter Video to FLV  Video to SWF converter Video to MOV converter Video to AVI converter AVI MPEG Converter MKV converter 

Output Videos to Various Mobile devices

iPod video converter  iPhone video converter 3GP video converter Blackberry video converter Video to mp4  Zune video converter  PSP video converter Gphone video converter Creative Zen video converter Iriver video converter 

Fast conversion and lossless quality output

Video converting software detects your CPU automatically and offers you the best speed.

Customize Video Settings

Crop frame size simply and fast to remove your unwanted area in the frame

adjust the frame brightness, saturation and contrast, and even add some artistic effects like old film, canvas.

Batch Mode Support

Convert several video files at once

Free software upgraded and best e-mail technical support.

No adware and spy ware disturbance, lifetime free update service.

All the products listed support free download service, it’s free to try until you think they are you wanted of then buy later. Each product has a user guide page of it own with detailed step by step description and you will be surely find just how simple and fun it is.wish you all good luck 

Be the first to comment - What do you think?  Posted by admin - October 11, 2009 at 7:40 am

Categories: Video   Tags: , , , ,

Audio Books CD: Between Cassettes and Downloads

Digital media has helped to make the audio books CD industry a successful venture for many companies. Many people prefer audio libraries composed of music books CD products rather than cassettes because they are more durable and they take up less space. Even though the internet is making digital downloads the most popular form of audio books, CD audio books offer permanence in the aspect that a CD music book is a hard copy.

Other than MP3 downloads of your favorite audio books, CD format is the next best thing. If you are a frequent traveler, you can take an entire music book on CD with you without taking up a lot of space. A CD audio book is also ideal if you want to loan your favorite book to a friend so they can listen to it.

Often, the MP3 files of audio books have copyright protection on them so you can only play them from your computer or personal media device. With an audio book on CD, you do not have to worry about this aspect.

Having your favorite music books CD is ideal because of the convenience in terms of listening to a book whenever you want. You can just pop it into your CD player and let it play in the background while you do what you need to do.

A CD audio book is also great for those long morning commutes. Since most cars do not yet have MP3 capability, an audio book CD provides the next best thing.

One of the best things about music books CD files is that you have an actual hard copy of your audio book to build your library. Often, MP3 players get lost or digital files get wiped out due to viruses or other computer problems.

Having your favorite audio books backed up on CD will prevent you from losing your entire collection due to these types of problems. Although a large music book CD collection will take up a lot of space, it is still a better format to prevent losing all of the time and money you have invested in building your audio books CD library.

Digital media formatting is quickly making the hard copy format of many products obsolete. The audio books CD industry is no exception. Many people are storing their entire music book library on their hard drives or portable media players.

The problem with this, is that they do not have backup copies prepared in case of a virus or computer crash. To prevent the loss of your data, you can order audio books CD files or cassettes. They might take up some space in your home, but it is well worth it in light of the potential time and money spent trying to replace an entire library.

If you are still stuck on the audio book cassette tape format, a completely new world awaits you. The music books CD industry has revolutionized the way people enjoy audio books, but even this medium is becoming obsolete as it is consistently losing ground to the digital format.

An audio book CD does provide conveniences that digital copies can not guarantee, but it also takes up valuable storage space.

Mike Selvon is the owner of various niche portals. Our audio books portal is a great resource for more information on audio books cd. While you are there don’t forget to claim your free gift.

Be the first to comment - What do you think?  Posted by admin - March 31, 2009 at 1:54 am

Categories: Audio   Tags: , , , ,

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