Frequency Standard

what are the different class of 10mhz frequency standard?

what are the different class of 10mhz frequency standard?
in terms of effienciey & price?

there are 20 diffrent classes

Science Fair 100 kHz FREQUENCY STANDARD Radio Shack Kit #28-140 MARKER GENERATOR $7.50

MONITOR PRODUCTS 10 MHz FREQUENCY STANDARD $9.95

Hallicrafters HT 7 Frequency Standard manual »R² $8.25

Vintage JK Crystals Radio Crystal Standard Frequency 100 KC PN: 24292 Ham $24.99

10mhz Rubidium Atomic Frequency Standard for counter $80.00

Rubidium Atomic Frequency standard FE-5680A Series $199.00

RADIO FREQUENCY SYSTEMS STANDARD GROUND KIT for 3″ CELLFLEX COAXIAL CABLE 300RFS $4.95

fe5680a Rubidium Frequency standard $215.08

FE5680A Rubidium Frequency standard $99.00

10mhz 1pps Rubidium Atomic Frequency standard FE-5680A $159.99

1 Hz to 20 MHz Programable Rubidium Frequency standard $147.99

RUBIDIUM ATOMIC FREQUENCY STANDARD FE5650A OUTPUT 10MHz $175.00

FREQUENCY STANDARD NO 9-1073 MEISSNER VINTAGE $84.99

Rubidium Atomic Frequency standard FE-5680A Series $199.00

1 Hz to 20 MHz|Programable Rubidium Frequency standard $149.00

A loudspeaker, speaker, or speaker system is an electrical device that can convert electrical signal into sound. They are the most invincible in the system audio and have the ability to produce different and distinct sounds that make music more audible.

The history of the speakers, probably started in the year 1876 when Alexander Graham Bell patented the first electrical loudspeaker. From then until 1950 the standard of speaking was poor when compared with the modern.

To play a wide frequency range speaker system requires more than one driver, or the high sound pressure levels or high fidelity applications. The investigation is ongoing, development and technology revolution have given rise to a variety of improvements, including improvements in cone materials, introduction of high temperature adhesives, improved permanent magnet materials, improved measurement techniques, computer aided design and finite element analysis, which leads to the experience remarkable acoustics.

Selection of speakers is one of the most important tasks, while the creation of any audio or video system. It is very important to know where the speakers will be placed in different rooms have different requirements. The large room speakers require more power to production levels high volume without distortion, so a greater need for amplifiers or speakers for great rooms more efficient. When the election, some points should be considered as balance and range of frequency tuning, the types of speakers, etc.

The frequency range term defines the accuracy of the speakers can play the highest and lowest frequency. We can get through some of the pompous-sounding speakers at a high frequency of song as it becomes low almost inaudible. A good pair of speakers have the brightness to achieve the right balance and play each sound at the level of precision.

If the frequency range is poor and the balance is not maintained, the sounds tend to become blurry or raw when volume increases. At the same time, speakers can not reproduce sound at low volumes after reaching a certain point. Some speakers play sounds alike and no distinction between hard and soft tones.

The best way to test the neutrality speaker is playing on a recorded human voice. If the voice recording sounds like it does in real life or sounds as if the person is speaking in a monotone then he is certainly well balanced and a good frequency range. The balance control not only changes the relative volume of the speakers, but also delays the speaker sound closer to the ear to all sounds that can reach the ear simultaneously.

If we talk technically about the balance and range of frequencies directivity speaker becomes an important issue because it affects the frequency balance of sound that the listener hears and the interaction of the speaker with the room. Directivity measures the power density real radiating antenna in the direction of his strongest issue. A speaker with high directivity can be said to have high quality.

About the Author:

Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, DJ equipment, recording equipment, speakers, and microphones.

Article Source: ArticlesBase.com – Balance and Frequency Range of the Speakers