AUDIX TM1 Omni-directional test and measurement microphone

Omni-directional test and measurement microphone for RTA and software systems.

The TM1 is a 6 mm pre-polarized condenser microphone used for test and measurement applications. The TM1 is known for its linearity, accurate response, consistency, ease of use and affordability.

Equipped with a uniformly controlled omnidirectional polar pattern, the TM1 is designed to capture acoustic measurements for room analysis software programs, real time analyzers and other sound control devices. With a flat frequency range of 20 Hz – 25 kHz, the TM1 is an excellent tool for sound engineers, sound companies and recording enthusiasts.

The TM1 is designed, machined, assembled and tested by Audix in the USA.

Model Variation: TM1 PLUS - includes calibration data file and sensitivity, threaded acoustic windscreen, and CA4231 machined calibration adapter *

*Bruel & Kjaer® 4231 sound level calibrator or equivalent

Internally switchable proximity effect compensation and sensitivity reduction.

The BCM 104 condenser microphone is the first product in the new Broadcast Line,
which is especially tailored to the demands of professional radio announcing.
What sets the Broadcast Line apart is a completely independent, functionally-
optimized design derived from extensive 3D simulations.
The large-diaphragm condenser capsule used in the BCM 104 has a cardioid directional
pattern with internally switchable proximity effect compensation. A second switch allows
the sensitivity to be reduced by 14 dB.
The microphone headgrill twists off easily for quick cleaning. Neumann offers optional,
color-coded headgrills so that, for reasons of hygiene, each announcer working at an
announcing desk can use his or her individual headgrill.
Directly in front of the capsule, mounted on a frame holder, is a piece of fine gauze that
serves as a built-in popscreen.
The BCM 104 has an elastic mount against structure-borne noise, that is compatible with
standard broadcast-segment microphone arms.

Features:
Cardioid microphone for broadcast & studio
Large diaphragm condenser capsule with
switchable proximity compensation
Distinctive design
Integrated pop screen
Quick release head grille for easy cleaning
Individual head grilles available for each user

Acoustic features
The microphone headgrill houses the K 04 large-diaphragm capsule, which has a flat frequency
response up to 3 kHz. Higher frequencies have an increased presence of 2 dB maximum.
Since the above-mentioned microphone characteristics are obtained without the use of resonance
effects, the microphone features excellent transient response and transmits all transient phenomena
of music and speech without any coloration.
The integrated Pop Screen
A pop screen not only prevents the occurrence of plosive pop noises in vocal recordings, but also
efficiently prevents unwanted particles, from respiratory moisture, nicotine, to food remnants, from
settling on the diaphragm.
The pop screen can be removed for cleaning without the use of tools.

Electrical features
Instead of a transformer to couple the microphone output to the supply voltage, the BCM 104
has an electronic circuit which, like a transformer, provides for good common mode rejection.
Interference induced in the balanced modulation line is thus suppressed as usual.
With a very low self-noise of 7 dB(A), and an overload capability extending to 138 dB SPL,
the BCM 104 has a dynamic range of 131 dB (DIN/IEC 651).
Filter and Preattenuation
The BCM 104 amplifier has a linear operation down to 20 Hz. An active filter efficiently suppresses
signals below this frequency. In order to compensate for the proximity effect, a high-pass filter,
electronically activated by a switch, is built into the microphone. This filter reduces frequencies
below 100 Hz by 12 dB/octave.
A 14-dB preattenuation switch is provided in order to adjust the sensitivity, if necessary,
to transmission circuits designed for dynamic microphones. But this will increase the
self noise by 14 dB.Both switches are located inside the microphone housing, since they
will normally be operated only once, when the broadcasting facility is set up.
Mounting
The preferred mode of operation is to suspend the BCM 104 from a standard studio boom arm.
A thread adapter to fit different connector threads is included.
In order to provide protection from structure-borne noise, both the capsule and the microphone
in its mount are elastically suspended.
The optional SG 5 swivel mount allows additional angling of the BCM 104 by +/-90 degrees.

Application hint:
While designed to be an announcer's mic for broadcasting and studio, this is
just one of the most common applications. With additional experimentation,
you will gain maximum use from this microphone.

Technical Description:
Acoustical operating principle: Pressure gradient transducer
Directional pattern: Cardioid
Frequency range: 20 Hz -- 20 kHz
Sensitivity at 1 kHz into 1 kohm: 22 mV/Pa
-14 dB attenuation: 4.4 mV/Pa
Rated impedance: 50 ohms
Rated load impedance: 1000 ohms
Equivalent SPL CCIR 468-3: 18 dB
Equivalent SPL DIN/IEC 651: 7 dB-A
S/N ratio CCIR 468-3: 76 dB
S/N ratio DIN/IEC 651: 87 dB
Maximum SPL for THD 0.5%: 138 dB
Maximum SPL for THD 0.5% with preattenuation: 152 dB
Maximum output voltage: 10 dBu
Dyn. range of the mic. amplifier DIN/IEC 651: 131 dB
Supply voltage: 48 V +/- 4 V
Current consumption: 3.2 mA
Matching connector: XLR 3 F
Weight: 500 g
Diameter: 64 mm
Length: 85 mm

The improved version of the WH10, the Shure Model WH20TQG is a rugged, light-weight, dynamic headset microphone that provides high-quality voice pickup. It fits securely for active microphone users, such as aerobics instructors and musicians, with low visibility for stage appearances. The WH20 is suitable for any voice communications application where comfort and reliability are required.

The WH20 TQG has a cardioid (unidirectional) pickup pattern. This provides greater gain-before-feedback and isolation from ambient noise and other unwanted sound sources, such as air-conditioning, musical instruments and loudspeakers. A carefully shaped frequency response includes a voice-frequency presence peak and a low-frequency rolloff to compensate for the proximity effect inherent in cardioid microphones during close-talk operation.

An integrated elastic CROAKIES ? headband secures the headset comfortably. The headband, wireframe, and gooseneck are adjustable to accommodate any head size or shape. The WH20 TQG is supplied with a foam windscreen and clothing clip.

• Lightweight wireframe and headband adjust for a secure, comfortable fit
• Extra-strong, small-diameter attached microphone cable resists breakage
• Collapsible microphone boom for easy storage and transportation
• Smooth, natural frequency response comparable to high-quality dynamic hand-held vocal microphones
• High input clipping level eliminates overload distortion
• Reliable at temperature and humidity extremes
• Supplied foam windscreen and clothing clip
• The WH20TQG has a miniature four-pin female Tini "QG" connector for direct connection to Shure wireless body pack transmitters - This microphone to be used ONLY with an existing Shure body-pack transmitter.

Transducer

Shure WCM16 Πυκνωτικό Μικρόφωνο Κεφαλής

The Shure Model WCM16 headworn electret condenser microphone is intended for wireless use by
performers, lecturers, and others who require the highest quality voice pickup with maximum mobility.
Its wide frequency response, low RF susceptibility and reliable operation at temperature and humidity
extremes make the WCM16 suitable for virtually any vocal application. When used with the Shure bodypack
transmitters, the performance of the WCM16 closely resembles the finest conventional vocal microphones.

 Miniaturized active circuitry included in the cartridge assembly provides equalization that tailors the low-frequency
response to resemble the warmproximity effect of larger vocal microphones. Because of this low-end response, it
is not necessary to position the microphone directly in front of the mouth, thus avoiding much popping and breath
noise, even without the supplied foam pop screen.

 The microphone's hypercardioid unidirectional pickup pattern provides maximum isolation from ambient noise and
from adjacent sound sources such as musical instruments, loudspeakers and other performers. This permits higher
gain-before-feedback without loss or masking of vocals.

Features:

Extra lightweight, adjustable headband stays secure and virtually disappears while being worn
Response comparable to finest conventional vocal microphones
Hypercardioid polar pattern provides maximum isolation from vocalist's own instrument and those of other performers
Uniform polar pattern at all frequencies for maximum gain before feedback
High input clipping level eliminates overload distortion
Cable terminates as 4-pin mini connector
Supplied acoustic foam pop screen
Reliable at temperature and humidity extremes

Specifications:

Frequency Response
50 to 18,000 Hz
Polar Pattern
Hypercardioid, uniform with frequency
Output Impedance
1200 ohms
Output Level (close-talked at 1,000 Hz)
Open Circuit Voltage -55.0 dbV (1.8 mV) at 0.6 m
1 Pascal=94 db SPL
Maximum Sound Pressure Level
150 dB at 1% THD
Dynamic Range
121 dB
Output Noise
29 dB equivalent SPL, A-weighted
Signal-to-Noise Ratio
65 dB at 94 dB SPL
Polarity
Microphone: Positive sound pressure on diaphragm produces positive voltage on pins 3 and 4 with respect to pin 1 (ground) of microphone output connector
Receiver-- 1/4" Phone Jack Output: Positive sound pressure on diaphragm produces positive voltage on tip of receiver 1/4" output connector
Receiver-- XLR Output: Positive sound pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 of the XLR output connector
Current Drain
0.35 mA
Recommended Operating Voltage
+5 Vdc (positive on pin 2, negative on pin 1)
Environmental Conditions
Operating Temperatures: -18 to 60 degrees C (0 to 140 degrees F)
Storage Temperatures: -29 to 66 degrees C (-20 to 150 degrees F)
Humidity: 0 to 95%
Cable
1.5m (5 ft), small-diameter, shielded, with 4-pin mini connector
Case Finish (Microphone and Headband)
Matte black enamel
Net Weight
36 g (1.27 oz)

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