Boardcast Headset with Dynamic Microphone for camera crew , reporter (closed)
หูฟังบรอดแคส มาพร้อมไมโครโฟนแบบก้านในตัว ให้เสียงค่อนข้างแม่นยำและคมชัด
For many years, the DT 109 has been the standard headphone /microphone combination for live, remote broadcasting, studio, film, TV and language laboratory application. Rugged, field-servicable construction. The headphone transducers feature extended frequency response. Adjustable, noise-cancelling microphone provides clear, audible speech transmission.
Features
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Highly sensitive headphone and microphone transducers
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Excellent ambient noise attenuation
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Capable of handling very high SPL
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Rugged construction
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Excellent comfort for long-term wearing
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Modular construction for easy servicing
Headphone
Transducer type . . . . . . . . . . . . . . . . . . . Dynamic
Operating principle . . . . . . . . . . . . . . . . Closed
Frequency response . . . . . . . . . . . . . . . . 30 - 20,000 Hz
Nominal impedance. . . . . . . . . . . . . . . . 400 Ω ± 10% per cartridge*
Nominal SPL at 1 kHz . . . . . . . . . . . . . . 94 dB
T.H.D. . . . . . . . . . . . . . . . . . . . . . . . . . . < 1%
Power handling capacity . . . . . . . . . . . . 1000 mW 124 dB
Ambient noise attenuation . . . . . . . . . . approx. 20 dBA
Sound coupling to the ear . . . . . . . . . . . Circumaural
Headband pressure . . . . . . . . . . . . . . . . approx. 4.5 N
Weight (without cable) . . . . . . . . . . . . . 390 g
Microphone
Transducer type . . . . . . . . . . . . . . . . . . . Dynamic
Operating principle . . . . . . . . . . . . . . . . Pressure gradient
Frequency response . . . . . . . . . . . . . . . . 40 - 12,000 Hz
Polar pattern . . . . . . . . . . . . . . . . . . . . . Hypercardioid
Output voltage . . . . . . . . . . . . . . . . . . . approx. 2.5 mV at a distance of 5 cm
Nominal impedance. . . . . . . . . . . . . . . . 200 Ω
Load impedance . . . . . . . . . . . . . . . . . . ≥ 1000 Ω