Condenser Microphone
Condenser microphone having resistance against high temperature
Condenser microphone utilizable at high temperature and intense radioactive rays. The microphone has a tension ring and a backplate, both of which are made of a metal having a small coefficient of linear expansion relative to the other parts of the microphone. The tension ring is fitted to a tension ring holder, and the backplate is mounted on the tension ring holder through an insulating material so that the tension ring and the backplate are held together to form a unitary structure.
The microphone of the piezo-electric ceramic type, however, has a sensitivity of as low as -105 to -120 dB under the conditions of a high-temperature atmosphere. Therefore, the microphone of the piezo-electric ceramic type is not capable ofdetecting sound of small levels when it is used in a high-temperature atmosphere condition. Microphones of other types are not utilizable at high temperatures as a matter of course. Therefore, the conventional microphones are not capable of detectingsound of small levels when they are used as sensors under high-temperature atmosphere conditions.
An object of the present invention is to solve the above-mentioned problems inherent to the conventional art.Another object of the present invention is to provide an improved condenser microphone which can be used under the conditions of high temperature and radioactive rays.Another object of the present invention is to provide an improved microphone which is capable of detecting sound of small levels under the condition of high temperature.According to the present invention, there is provided a condenser microphone having resistance against high temperature and radioactive rays.
The microphone has a first cylindrical body having a bottom end member at its one end, a second cylindrical body threadedly engaged at its one end to the other end of the first cylindrical body, ring means threadedly engaged with the other end ofthe second cylindrical body, a vibration membrane fixed at its circumferential end to the ring means, and microphone structural body threadedly engaged with an inner surface of the second cylindrical body.
The microphone structural body has tensionmeans for imparting a tension to the vibration membrane, a backplate which has an upper surface spaced from the vibration membrane, and an insulator between the tension means and the backplate so that a unitary structure of the microphone structural bodyis formed. In the present invention, the tension means and the backplate are made of a metal having a small coefficient of linear expansion relative to the other elements such as the ring means and first and second cylindrical bodies.
In an embodiment of the invention, the tension means has a tension ring contacted with the vibration membrane, and a holder for holding the tension ring. The holder is threadedly engaged with the second cylindrical body and connected to thebackplate through the insulator. Preferably, the insulator is a glass insulator of aluminosilicate. In a further embodiment of the invention, the ring means has a first ring threadedly engaged with the aforementioned second cylindrical body and asecond ring fixed to the first ring with the circumferential end of the vibration membrane being secured firmly therebetween.
In a further preferred embodiment of the invention, the height from the upper end of the insulator to the upper end of thebackplate is set smaller by about 40 to 50 μm than the height from the upper end of the insulator to the upper end of the tension ring so that a gap of about 40 to 50 μm is maintained between the vibration membrane and the backplate when a tensionis imparted to the membrane by the tension ring.
According to the present invention, the tension imparted to the vibration membrane decreases as the temperature rises, and the effect of creep is restrained. Further, the gap changes very little between the vibration membrane and the backplateAccordingly, there is obtained a microphone which is highly sensitive and which exhibits good frequency characteristics under the conditions of high temperatures and intense radioactive rays. At a temperature of 300° C., for instance, themicrophone exhibits a sensitivity of -74. -.3 dB, and frequency characteristics of . -.5 dB over a range of 500 to 10 KHz. Therefore, the present invention makes it possible to detect low amplitude sounds that could not be detected so far under hightemperature atmosphere conditions.
While condenser microphone has been described with respect to a preferred embodiment, it should be apparent to those skilled in the art that numerous modifications may be made thereto without departing from the spirit and scope of the invention.
About the Author
Ningbo Tongxin Microphones offers the best variety of quality Condenser Microphone for Studio, Podcast, USB, Instrumen, Conference, Broadcast and Field Recording.
Condenser Microphone
The Samson C01U condenser microphone
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USB1C Condenser Microphone $79.99 USB Condenser Microphone |
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Electret Condenser Microphone $19.99 Record your meetings, lectures and interviews with the ECM-F8 electret condenser microphone. |
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Sennheiser Cardioid Condenser Microphone $399.99 Demanding recording and performing applications call for this condenser microphone with its lively, clear sound and high sound pressure handling capabilities. |
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MXL Condenser Microphone - Black $89.99 This condenser microphone features an FET preamp with balanced output for a wide dynamic range and a gold-sputtered diaphragm for low distortion. |
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Shure Condenser Microphone $199.99 This condenser microphone features an integrated preamp with Microphone Gain Control for control of input signal strength and Monitor Mix Control to blend microphone and playback audio. USB plug-and-play connectivity offers wide-ranging compatibility. |
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Behringer Studio Condenser Microphone $43.99 Capture your sounds with sensitivity and accuracy with this studio condenser microphone that features a large diaphragm for high audio quality. The metal material provides rugged construction and durability. |
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Mark-CV1 Professional Condenser Microphone $49 If you have never used a condenser microphone for singing before, you’re probably not aware of the enormous difference they can make to how well a singer sounds on stage as well as in the studio. This is so due to the fact that condenser microphones have |
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Senneheiser e914 Condenser Microphone $399.95 The Sennheiser e914 is a high-grade condenser microphone for very demanding applications. Its outstanding sound properties qualify the e914 for highly sophisticated applications like acoustic guitars, cymbals, percussion, overhead, orchestras, and grand pianos. |
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KSM32SL Condenser Microphone $549 The Shure KSM32SL is an embossed single-diaphragm, side-address, cardioid condenser microphone for highly critical studio recording and live sound productions. It boasts an extended frequency response with a wide dynamic range for an open, natural soundin |
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SCM-960 Studio Condenser Microphone $69 Nady's SCM-960 Studio Condenser Selectable Attenuation Pad Microphone is perfect for recording studio vocals, acoustic instruments, orchestras and choral groups, ambient instrument audio, and many live sound applications. Powerful and versatile, the SCM 9 |
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ECM-678 Shotgun Condenser Microphone $569 The Sony ECM-678 is a short shotgun, electret condenser-type microphone, which delivers outstanding sound performance in all field production and broadcast studio applications. It is also well-suited for use on Sony professional camcorders such as the HDV |
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LCT240 Condenser Microphone $249 With the LCT 240 2/3-inch diaphragm condenser microphone, LEWITT introduces a high precision multi-purpose mic that sets new benchmarks in terms of performance and ease of use. Designed for use in live performances as well as (home) studio recordings, the |
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LCT340 Condenser Microphone $469 LEWITT's LCT 340 is a 0.8 inch externally polarized condenser microphone that excels at capturing acoustic and percussion instruments, drums and vocals, and is perfectly suited for sophisticated live and studio applications. Two interchangeable capsules a |
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CAD Audio Condenser Microphone $99.99 Let your music shine with this microphone that features a large diaphragm gold-vapor deposited condenser for high sensitivity and low distortion. The 30Hz - 20kHz frequency response offers faithful sound reproduction. |
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CAD GXL2200 Condenser Microphone $49.95 The GXL2200 is a large diameter, fixed cardioid pattern, condenser microphone. High sensitivity and low distortion make this microphone an ideal candidate for recording, broadcast, sound reinforcement including vocal and instrument applications. The capsule in the GXL2200 features a 1 in. gold vapor deposited diaphragm. |
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Rode NTG2 Shotgun Condenser Microphone $269 The new RODE NTG-2 is a lightweight condenser shotgun microphone, designed for professional applications within the film, video, television and production industries. |
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On-Stage MY252 Condenser Microphone Clip $3.99 The On-Stage MY252 is a condenser microphone clip with a die-cast base with a 22mm inside diameter. |
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Nady SPC-15 Condenser Microphone $34.99 -45 dB -45 dB 1 kHz ±3 dB 1 x XLR Gold Plated 1.57" Height x 6.37" Depth 136 dB 200 Ohm 50 Hz to 18 kHz 6.25 oz < 1% Advanced internal shockmount design to eliminate handling noise Lightweight, roadworthy and durable for long life and reliability SPC-15 Condenser Microphone Microphone clip Foam windscreen User Guide Warranty card Foam padded plastic Carrying case 9~52V Phantom power A versatile and great sounding multi-purpose condenser microphone, the SPC-15 is perfect for vocal and instrument miking for both live performance and recording applications. Brass Cable Dynamic Electret Microphone Nady Nady System, Inc SPC-15 Condenser Microphone SPC-15NADY www.nady.com |
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Sennheiser Professional Condenser Vocal Microphone $269.99 This microphone features a supercardioid pickup pattern with an electret condenser transducer and a hum compensating coil for clear sound with minimal interference. |
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On-Stage Condenser Microphone Clip - Black $10.99 This microphone clip is compatible with most condenser microphones for wide-ranging use and features rubber material for durability. |
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Audio Technica Pro 37 Condenser Microphone $129 Small-diaphragm cardioid condenser microphone for studio recording and live performance. |
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Shure PG185TQG Lavalier Cardioid Condenser Microphone $39 The Shure PG185 is an electret condenser microphone for clip-on use with a wireless bodypack transmitter. |
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Sennheiser e908D Condenser Gooseneck Microphone with Clip $279.95 The e908 D condenser instrument microphone was especially designed for drums and percussion. |
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On-Stage MY120 Condenser Microphone Clip $8.95 The MY120 wireless rubber condenser microphone clip fits standard microphone stands and firmly holds your condenser microphone in place. The MY120 is a straight style clip with a 20mm inside diameter and a 5/8 inch 27 female threaded insert in the plastic base. |
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Shure KSM137 Condenser Microphone $665 The Shure KSM137 is an end-address condenser microphone with a cardioid polar pattern. Designed for studio use, yet rugged enough for live applications, the KSM137 can withstand extremely high sound pressure levels (SPL). Its low self-noise and extended frequency response make it ideal for recording musical instruments. |
Choosing A Condenser Microphone: Understanding The Different Types Of Microphones
Condenser Microphone from a technical aspect operate on the electromagnetic principle, just like the electromechanical loudspeaker. Condenser Microphone are mainly used when working with a loud sound source that doesn't contain a lot of high frequency detail, because typically, Condenser Microphone tend to accent the middle of the frequency spectrum. Condenser Microphone are seen primarily in live situations where moisture and other factors come into place. No pre-amplifier is needed for this type of microphones.
Condenser Microphones
The condenser microphone, technically, is an electrical system that depends upon variations in the internal capacitance. Condenser microphones require power supply, typically phantom power or a small battery. They are used primarily in studio recording because they are known for their all around frequency response.
Electret Condenser Microphones
In the microphone world, the electret condenser microphone is a relatively new microphone (circa 1962). It works similar to the condenser microphone, but the condenser plate is made from an electret material to provide the polarizing voltage. They don't require phantom power to charge the diaphragm (like the condenser), however they do require a power supply for their in-microphone preamplifier.
Ribbon Microphones
The Ribbon Microphone (also referred to as a "velocity" microphone) is a type of dynamic microphone that uses a thin metal ribbon placed between the poles of a magnet and generate voltages by electromagnetic induction. Ribbon mics do not require phantom power, which if enabled, actually can destroy this type of microphone. Ribbon microphones are generally the most delicate and expensive microphone because they are known for their ability to capture fine high-frequency detail.
Here are some things you should know, from the school of hard knocks, about microphones and their uses.
Types: There are many types of microphones available but they generally divide into three groups: dynamic, condenser and ribbon.
Condenser Microphone are the most common and the most basic types of microphones. They consist of a diaphragm attached to a coil that moves through a magnetic field inducing a small electrical signal. They operate using similar principals to a speaker and tend to have a limited frequency response, but are very rugged.
Condenser microphones have become more popular over the years because they have a very wide frequency response (tone) and are not as delicate or as expensive as ribbon microphones. They are, however, more delicate than Condenser Microphone. They require a power source that can be an internal battery, an external power pack or phantom power that is provided by the mixer. They work by supplying a charge to a fixed plate that creates a capacitor. A thin diaphragm is mounted adjacent to the plate and induces voltage changes in the plate when subjected to sound vibrations.
Ribbon microphones produce sound by stretching a thin metal ribbon across a gap of a strong magnet. Sound moves the ribbon across the magnetic field creating electrical impulses. They have an excellent frequency response (tone) but tend to be very delicate and expensive. Since they are rarely used in basic P.A. systems, nothing more needs to be said about them.
Polar Patterns: This refers to the directions that the microphone will pickup sound from. Polar patterns tend to be divided into two types: omni and uni-directional.
Omni directional microphones are rarely used because they pick up sound from all directions and often pick up sound from directions you don't want to have sound picked up from.
Uni-directional microphones are the most common and probably total more than 95% of all microphones sold. They range from the shotgun, picking up sound from only straight in front of the microphone, to the cardioid, picking up sound from in front
of, or somewhat around the front of, the microphone in a heart shape pattern.
Knowing the pattern of a microphone is VERY important because it affects what area of sound that the microphone picks up from, as well as its susceptibility to feedback.
Sensitivity: This refers to the level of "hearing" that a microphone possesses.
The higher the sensitivity, the quieter the sounds that it will pick up. This is an important specification, especially dependant on your stage volume.
As you can see, chosing the correct microphone for your application can solve and enhance your performance and overall sound field from the stage. After all, your music, as represented by great sound, is what its all about.
A condenser microphone could be very important you probably have a plan on recording an acoustic instruments or vocals. A condenser will value about $100. If in case you have more cash you're going to get a greater microphone. You'll need not less than one microphone to work on recording. If you happen to plan to recording extra instruments, then you'll need extra condenser microhone.
About the Author
Ningbo Tongxin Microphones offers the best variety of quality Condenser Microphone for Studio, Podcast, USB, Instrumen, Conference, Broadcast and Field Recording.
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Sennheiser HSL10 Handset Lifter $51.94 Gemini HSL10 Combo Headset MicrophoneFeatures:Combo Headset / Lavalier MicConvertible, lightweight headsetDetachable lavalier microphoneFoam wind and pop control insertsPadded non-slip face restFlexible headband to fit most sizesEasy grip lavalier clipInternational Info:? This item will work on both 110V and 220V/240V power systems or does not need power. This item is will work perfectly anywhere ... |
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Olympus ME-52W Noise Canceling Microphone $11.02 The ME-52W plugs directly into your digital recorder''s 3.5mm microphone jack for uni-directional recording in high-noise environments. It will cut down on much of the background noise and result in a more accurate transcription.... |
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Blue Microphones The Pop Universal Pop Filter $24.60 The Blue The Pop Universal Pop Filter is a universal windscreen for use with any microphone. Simply clamp it to the mic stand and position where desired. The sturdy wire mesh and frame ensure years of durability. So be sure to pick one up today!... |
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Corsair CA-9011112-WW Vengeance 1500 Dolby 7.1 USB Gaming Headset $84.99 If you have onboard sound, the Corsair CA-9011112-WW Vengeance 1500 Gaming Headset offers easy one-cable USB connection and Dolby headphone technology that allows you to enjoy multi-channel games the way they were meant to be played. It features 50mm drivers which greatly reduce the overloading and distortion that can happen with gaming headsets that uses 40mm drivers. It's also equipped with in... |
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NEW Icicle XLR to USB Converter (HEADPHONES) $61.76 Manufacturer: Blue MicrophonesManufacturer Part Number: ICICLEManufacturer Website Address: Brand Name: Blue MicrophonesProduct Name: Icicle Microphone PreampProduct Type: Microphone Preamp... |
