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SM31FH Fitness Headset Condenser Microphone
SM31FH
Product Specifications
www.shure.com
©2013 Shure Incorporated
Type Electret Condenser
Frequency Response 45 to 20,000 Hz
Polar Pattern Unidirectional (Cardioid)
Output Impedance
@ 1 kHz
600 Ω
Audio Output Level -50 dBV/Pa
Signal-To-Noise Ratio
[1]
@ 1 kHz
66 dB
Maximum SPL
[1]
1000 Ω load, @ 3% THD
145.0 dB
Dynamic Range
[1]
@ 1 kHz, 1000 Ω load
117.0 dB
Equivalent Output Noise
[1]
Typical, A-Weighted
28 dB
Power Requirements +5 V DC (nominal), 10 V maximum (DC bias)
Polarity Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1
Cable 1.1 m (45 in.)
Connector TA4F
Net Weight 60 g (2.11 oz.)
[1]
Measurements taken using RK100PK preamp set @ 0 dB using 8k bias resistor.
* All specifications measured with a 48 VDC phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.
Specifications
Overview
The new SM31FH adds hydrophobic materials to the industry-standard, road-tested Shure SM family in a rugged and durable cardioid condenser microphone.
TA4F 4-pin connectors make it a viable replacement for any existing Shure wireless headset system, and is also available with BLX and GLX-D wireless system
bundles. The moisture-repelling cartridge housing protects the microphone and ensures a long lifetime of use, all but eliminating the need to frequently replace
typical headsets.
Features
• Wearable wireframe headset with secure, comfortable fit made for fitness and aerobics instructors
• Integrated moisture-repelling hydrophobic fabric protects the microphone element from harmful corrosion for use in humid environments
• Flexible gooseneck design provides discrete adjustment options to optimize placement for greatest isolation
• Lightweight and low-profile form factors stave off fatigue during high-impact use
• Compatible with Shure wireless bodypack systems for direct replacement of TA4F-connected microphones
• Available with a wide variety of Shure wireless systems, renowned for their ease of use and reliable performance
• Included windscreen tames plosive, breath and wind noise for clean and intelligble sound
• Tailored frequency response refined for crisp and clear vocal reproduction
• Legendary Shure precision engineering for durability and performance
Available Models
SM31FH-TQG Fitness Headset Cardioid Condenser Microphone with Windscreen
BLX1288/SM31 BLX Dual-Channel Wireless Combo System
BLX14/SM31 BLX Wireless Headset System
BLX188/SM31 BLX Dual-Channel Wireless Headset System
GLXD14/SM31 GLX-D Digital Wireless Headset System
Optional Accessories
RK379 Replacement kit with clip + 2 foam windscreens
Frequency Response
20
15
10
5
0
-30
-25
-20
-15
-10
-5
dB
Hz
20 100 1k 10k 20k
0.6 m (2 ft.) from sound source 1 cm (0.4 in) from sound source
Polar Patterns
250 Hz
125 Hz
500 Hz
5,000 Hz
10,000 Hz
1,000 Hz

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