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Type 1600MDN Microphone dynamic range Measuring System |
| Type 1600 MDN |
Main Functions |
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TYPE 1600MDN can test the dynamic range of all kinds of microphones, which are: (1) Tests the distortion value and curve of the microphone at 100 ~ 160dBSPL; (2) Tests the inherent noise of the microphone. Any type of microphones, including Electret Condenser Microphone(ECM), Dynamic, Piezo, Ceramic and Carbon Microphones. |
| Catalogue pdf File |
Combination Specifications 1600MDN Set Up Program Down Load
Distortion Chart of Type 1600MDN Example of Testing Screen Go Back
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The fundamental combination of Type 1600 MDN Go Back |
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Item |
Model No. |
Description |
Usage |
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1. |
160 A |
Electroacoustic Analyzer |
Mainframe. To control and process the input、output signal. |
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2. |
Monitor & Keyboard |
High Resolution Color Display Monitor & Keyboard |
Display the tested results & data and key in data. User may buy these two items at his local market, since price is cheaper and can save freight charge and import tax. |
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3. |
168 |
Microphone Distortion / Noise Test Set |
168+169 must combine with 160A to
test the microphone:
(1)
High sound pressure distortion curve (100~160dB distortion
curve). (2) Inherent noise, can test as low as -5 dBA inherent noise of the microphone. |
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4. |
169 |
Microphone Distortion / Noise Test Box |
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5. |
X-Y Mouse |
Mouse |
Replace the upward, downward, leftward, rightward and enter keys on the keyboard. |
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6. |
HP Printer ( Option ) |
Printer (All the HP DeskJet or HP Laser Printers that are supported by DOS can all be used.) |
Print out the tested results & data. |
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Functions and Specifications of Type 1600 MDN Go Back |
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1600MDN is used for testing the
dynamic range of microphones. The dynamic range means one, distortion
and two, noise.
(1)
Distortion :
What is the upper sound level limit the microphone can receive on
which the distortion of the output electrical signal of the microphone
is limited to a reasonable value? Usually this specification is
expressed as the input sound pressure level (SPL) while 3%, 5% or 10%
output distortion is used as the “Reasonable value”. It is true
important that the sound source itself must generate much less
distortion than the “Reasonable value” under such high sound level.
(2)
Noise : The inherent noise of the microphone
restricted the application of such microphone in low sound level. The
less the inherent noise and the better the S/N, which means the
microphone may transfer clearly even in a very soft and low level
speech.
Since the manufacture of a high
level - low distortion sound source is very difficult. Also to read
out the noise as lower as the level of
μV is very
difficult, the measurement of the dynamic range of microphones is
truly difficult technically.
The design of 1600MDN solves the above
two difficulties masterly. It has the following features :
A.
1600MDN can generate 100 to 160 dB SPL at
1 kHz with very low distortion. Each 1600MDN is attached with a
distortion chart.
This was measured by a B&K 4134 microphone which was placed at the
sound field generated by 169 sound source. The measured distortion
should be the amount of B&K 4134 and SUNLIGHT Sound Source 169. The 1%
distortion at 154 dB SPL means the distortion of Model 169 must be
less than 1%. (Please note that the specification of distortion of B&K
4134 at 160 dB SPL is less than 3%, It is very
difficult to keep the distortion as lower as 1% at 150 dB SPL, but the
SUNLIGHT Type 1600MDN can do it! Specification of the distortion of 1600MDN sound source Model 169 :
≦
1 % ( 100 to 150 dB SPL; typ.< 0.7% )
Start/stop point of the high sound level scan
:
Can be set between 100 to 160
dB. Please note that 160 dB can be set only when omnidirectional
microphones are measured. If unidirectional microphones are measured,
the 160 dB may not be reached (several dB less) due to the direction
pattern of the microphone.
Interval of the high sound level scan
:
Can be set from1
dB/step to 10 dB/step.
B.
The isolating of the box of Model 169 is as high as 58 dB A
measured by pink noise. This means the inherent noise of the
microphone can be measured accurately in a quiet ordinary room (e.g. <
50 dB A). It is not necessary to be used in the anechoic chamber.
C.
After putting the microphone into the box, the user needs only
press a key, then both distortion curve and inherent noise will be
measured automatically, continuously and quickly. It is so fast that
the measurement is suitable for use in production line.
D. Because the inherent noise of the microphone is very small (in the level of mV), it is very difficult to measure such small voltage using ordinary instrument. The special design of 1600MDN solves the difficulty, and makes the measurement much quicker and easier.
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