| DPA BLM4060 Boundary Layer
Microphone |
|
ProductCode:
BLM4060
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• ideal for use in
boardrooms, conference facilities, courtrooms, teleconferencing
• optimized to boost speech intelligibility
• works with a wide range of connection adapters and power
supplies
The BLM4060 Boundary Layer Microphone is ideal for use in
boardrooms, conference facilities, courtrooms, teleconferencing and
other applications where excellent vocal pickup is required.
Microphone
The BLM4060 is a transducer designed to work under optimum
conditions when placed on a tabletop, but it also performs well on
any other hard, flat surface that reflects sound. The microphone
element is a prepolarized omnidirectional miniature condenser
microphone with a 5.4 mm (0.2 in) vertical diaphragm specially
designed for maximum performance. The microphone body consists of a
centre rubber disc that holds the microphone element mounted in an
elegant stainless steel base. The BLM4060 has a 3 m (10 ft)
cable.
Position
The BLM4060 can be very easily placed in essentially any position
on the surface, even close to the edge (See graphs & more).
Users will benefit from the special characteristics of the
surrounding sound field on which the BLM4060 is mounted: a 6 dB
gain of direct sound and only 3 dB gain of the diffuse sound.
Therefore, the sound captured has both a greater clarity -
especially at high frequencies - and speech intelligibility
compared to sound captured above the surface.
Accessories
A wide range of connection adapters and power supplies makes it
possible to use the BLM4060 with any microphone input. It is
delivered with a DAD6001 adapter
|
| Directional
characteristics: |
Omnidirectional, hemisphere |
| Principle of
operation: |
Pressure |
| Cartridge type: |
Pre-polarized condenser element |
| Frequency range, ± 2
dB: |
20
Hz – 14 kHz (with 7 a dB soft boost at 8
kHz) |
| Sensitivity, nominal, ±3
dB: |
20
mV/Pa at 1 kHz; -34 dB re. 1 V/Pa |
| Equivalent noise level
A-weighted: |
Typ. 23 dB(A) re. 20 µPa (max. 26 dB) |
| Equiv. noise level ITU-R
BS.468-4: |
Typ. 35 dB (max. 38 dB) |
| S/N ratio, re. 1 kHz at 1 Pa (94
dB SPL): |
71
dB(A) |
| Total harmonic distortion
(THD): |
< 1 % up to 123 dB SPL peak, < 1 % up to 120 dB SPL RMS
sine |
| Dynamic range: |
Typ. 100 dB |
| Max. SPL, peak before
clipping: |
134 dB |
| Output impedance: |
From MicroDot: 30 – 40 ohm. From DAD6001: 100
ohm. |
| Cable drive
capability: |
Up
to 300 m (984 ft) |
| Power supply: |
Min. 5 V – max. 50 V through DPA
adapter |
| Connector: |
MicroDot/XLR 3-pin |
| Microphone weight: |
240 g (8.5 oz) excl. cable |
| Microphone diameter: |
100 mm (4 in) |
| Microphone height: |
Height: 12 mm (0.5 in) |
| Cable length: |
3
m (10 ft) |
| Cable color: |
Black |
| Cable diameter: |
1.6 mm (0.06 in) |
| Finish: |
Black rubber disc mounted in stainless steel
base |
| Polarity: |
Positively increasing sound pressure produces positive going
voltage on MicroDot pin/pin 2 on XLR connector |
| Operating temperature
range: |
-10 to 45°C (14 to 113° F) |
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