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Compression Driver Design

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Details of a high-frequency compression driver are shown in Figure 1. In contrast, by using a circumferential phase plug with carefully chosen entrance points, the designer can help reduce the dome’s modal effects that make it to the horn throat. At high frequencies above 6kHz the wavelengths can be smaller than 50mm / 2in and would easily cancel each other across the surface of the dome. It works in a "compression" mode; the area of the loudspeaker diaphragm is significantly larger than the throat aperture of the horn so that it provides high sound pressures. http://vocollectapp.com/compression-driver/compression-driver-horn-design.html

Get started today Get started What is Prezi? Finally, we’ll briefly discuss how the wave behavior through the phase plug can cause problems downstream in the horn. preprint 7258. ^ http://www.audioxpress.com/magsdirx/voxcoil/addenda/media/seaandland.pdf Sea & Land's Speaker Protection Devices ^ http://www.patentstorm.us/patents/6201680/description.html US Patent 6201680 - Adjustable high-speed audio transducer protection circuit External links[edit] WESTERN ELECTRIC speakers Retrieved from "https://en.wikipedia.org/w/index.php?title=Compression_driver&oldid=768208096" Categories: Cone loudspeakers are known as direct radiators due to the fact that they are an electromechanical moving system that couples via the cone directly to the air around it. https://en.wikipedia.org/wiki/Compression_driver

Compression Driver Vs Tweeter

Let’s examine some of the principles behind the operation of phase plugs, beginning with the diaphragm inside the compression driver. In comparison, a horn loudspeaker with a midrange compression driver efficiency of 25 to 30 percent will require as little as 10 or 12 watts of power input to produce the The waves travel across the surface at a defined speed, reflect off the walls of the tub, and soon form a pattern of standing peaks and valleys across the surface. Wave-length 18in / 440mm. 1in and 2in refers to the throat diameter of the horn.

These old horns can still be seen in a very few old cinemas and museums. The lens improves horizontal dispersion as the frequency increases. Other than its use of electromagnets, Thuras’ creation would be readily recognizable to modern pro sound practitioners as a compression driver (Fig. 1). Compression Driver Vs Piezo Phase plug designs for compression drivers have been pursued using two general classes of designs.

Wente and A.L Thuras in "A High-Efficiency Receiver for a Horn-Type Loudspeaker of Large Power capacity" in the Bell System Technical Journal, 1928. [2] They devised a plug placed in front Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. This can result in changes to the coverage angle, or to variations in the sound intensity across the wavefront in the horn. Check out this article to learn more or contact your system administrator.

Ignorance and miss-understanding was and still is a problem throughout the professional audio industry. Compression Drivers For Sale When constant directivity horns were first marketed, many senior engineers were jokingly heard saying "They are not called bum horns for nothing".    The principles behind constant directivity and wave It is large, fragile and expensive. By using this site, you agree to the Terms of Use and Privacy Policy.

Compression Driver Horn Design

slot radiator bum tweeter bullet tweeter Compression tweeters are approx 106 - 110dB/m/W efficient. 50 - 100 Watt Compression tweeters have always been https://prezi.com/sxs9kuem9w4l/wideband-compression-driver-design/ There is no exception to this rule. Compression Driver Vs Tweeter The total area of the slits at the diaphragm side of the driver is approximately one-eighth to one-tenth of the area of the diaphragm itself. Compression Driver Vs Bullet Tweeter A Brief History The compression driver’s genesis arguably starts before the Great Depression with Western Electric engineer Albert Thuras’ 1926 submission for a patent on an “Electrodynamic Device.” This patent was

Against marketing and popular belief compression drivers do not successfully produce energy above 6k - 10k Hz. http://vocollectapp.com/compression-driver/compression-drivers-uk.html For instance, is the wavefront from the compression driver flat (i.e., plane), or does it have some curvature? Because the on-axis frequency response can remain flat, no compensation is required for near field listening. You need JavaScript enabled to view it..   View the discussion thread. Midrange Compression Driver

Meeting the Horn Ultimately, the compression driver phase plug’s core purpose is reducing the open area the driver diaphragm radiates into and then gradually transitioning that smaller area to the horn Radial phase plugs, while being simpler to manufacture and having a more gradual air cavity effect, expose the entire range of modal behavior across the dome’s full diameter. The Multi cell horn was the most common horn for large cinemas until 1960 (at top of page ). http://vocollectapp.com/compression-driver/compression-driver.html The next innovation came from E.C.

As is true for cone loudspeakers, most of the early development in horn loudspeakers began when sound was first put to picture back in the 1930s when the first "talking films" Horn Driver Speaker This, however, complicates the manufacture of the circumferential phase plug, which is already a complicated, expensive piece to produce. In 2012 he received his PhD from the ISVR for a thesis on the acoustic design of compression driver phase plugs.

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To grasp the complexities facing the phase plug, we first consider the behavior of compression driver diaphragms. Read the rest of this post 1 2 Comments Leave a Reply Cancel reply Your email address will not be published. Musical instrument horns are also round and directional. Compression Driver Protection Both types have phase plugs tasked with bringing sound to the horn throat.

Changing shape from circular is a compromise that reduces efficiency and causes lobe distortion. The dome is very fragile and should not be touched. The lens is no longer used. this contact form Editors Picks What Have You Done For Your Ears Lately? Real World Gear: The Latest On Large-Format Digital Consoles A Mastering Engineer’s View On A Quality Mix Road

An acoustical lens is the equivalent of the optical lens. Papers are commonly presented at the AES conferences that investigate performance tweaks in phase plug design. A labyrinth of concave plates is put in front of the horn. Horns for sound systems are changed in shape to rectangle to increase horizontal dispersion.

This is a major problem with constant directivity horns. They also outlined criterion for the design of the channels in the plug and suggested a path-length based design approach to maximize the bandwidth. A reasonable question to ponder is why sound traveling through the dome quickly is desirable. Different compression drivers can perform with great variability on the same waveguide or horn, depending on the shape of the wavefront they emit.

The muted, splashy, shrill, or honky compression drivers of days past continue to give way to impressively clear modern designs. We’ll discuss diaphragm behavior as it influences phase plug design, and then follow the sound pathway’s progression through the phase plug to the horn throat. The largest dome is 4in in diameter. The decrease in radiating area increases the local pressure and creates a better acoustic impedance match, which in turn increases output.

Each cells was individually constructed and grouped together to form various arrays. A compression driver is a small specialized diaphragm loudspeaker which generates the sound in a horn loudspeaker. Dr. This work was largely ignored by his contemporaries and was only later popularized by Fancher Murray.[6] Today the majority of compression drivers, either by inheritance or design, are based on the