Audio-Technica AT4021 Manual de Usario

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CARDIOID CONDENSER MICROPHONE
- Outstanding performance and rugged construction, ideal for critical
studio & live applications
- High SPL handling and wide dynamic range
- Flat, extended frequency response
- Switchable 80 Hz hi-pass lter and 10 dB pad
- High front-to-back rejection ratio – cardioid polar pattern improves
isolation of desired sound source
- Low self-noise perfectly suited for digital recording equipment
- Exceptional reproduction of low-frequency sounds
- Low-mass element for superb transient response
The AT4021 is intended for use in professional applications where
remote power is available. It requires 48V DC phantom power, which
may be provided by a mixer or console, or by a separate, in-line
source such as the Audio-Technica AT8801 single-channel or AT8506
four-channel phantom power supplies.
Output from the microphones XLRM-type connector is low
impedance (Lo-Z) balanced. The signal appears across Pins 2 and
3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” positive
acoustic pressure produces positive voltage at Pin 2.
To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.
An integral 80 Hz hi-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position reduces
the microphone's sensitivity to popping in close vocal use. It also
reduces the pickup of low-frequency ambient noise (such as trafc,
air-handling systems, etc.), room reverberation and mechanically-
coupled vibrations.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 43°C for extended periods. Extremely high
humidity should also be avoided.
FORM No. ATGC-L0145-08-E
Machida Tokyo Japan
SPECIFICATIONS
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Cardioid
FREQUENCY RESPONSE 20-20,000 Hz
OPEN CIRCUIT SENSITIVITY -34 dB (19.9 mV) re 1V at 1 Pa
IMPEDANCE 250 ohms
MAXIMUM INPUT SOUND LEVEL 146 dB SPL, 1 kHz at 1% T.H.D.
156 dB SPL, with 10 dB pad (normal)
NOISE 14 dB SPL
DYNAMIC RANGE (typical) 132 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO 80 dB, 1 kHz at 1Pa
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave
PHANTOM POWER REQUIREMENTS 48V DC, 3.0 mA typical
WEIGHT (less accessories) 119 g
DIMENSIONS 144.0 mm - long,
21.0 mm - body diameter
OUTPUT CONNECTOR Integral 3-pin XLRM-type
ACCESSORIES FURNISHED AT8405a snap-in clamp for ⅝”-27
threaded stand; windscreen;
protective carrying case
10 dB
20k10k5k2k1k50020010050
8 kHz
200 Hz
1 kHz
5 kHz
330°
300°
270°
240°
210°
180°
150°
120°
90°
60°
30°
Polar Pattern
Frequency Response
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
Frequency in Hertz
LEGEND 12” or more on axis
Response in dB
Optional Accessories:
AT8506 four-channel 48V phantom power
supply (AC powered).
AT8801/EU single-channel 48V phantom
power supply (AC powered).
Roll-off
10 dB
20k10k5k2k1k50020010050
8 kHz
200 Hz
1 kHz
5 kHz
330°
300°
270°
240°
210°
180°
150°
120°
90°
60°
30°
指向特性
频率特性
声压曲线 1刻度5 dB
频率
频率 (赫兹)
电平 平直
响应电平 (dB)
FORM No. ATGC-L0145-08-C
Machida Tokyo Japan
心形指向性电容话筒
- 杰出的表现和坚固的结构,适合于录音室和现场收音的应用。
- 可处理高声压电平,提供更大的动态范围。
- 平滑而伸展的频率响应
- 设有80Hz高通滤波开及 10dB衰减。
- 心形指向性收音,可减低话筒两旁到后方 噪音,改善音源
收 。
- 低噪声结构,完全合适于高级数字录音设备。
- 增强对低频响应的重现。
- 轻重收音头设计,可提供更大的瞬间响应。
AT4021需要使用 幻象供电工作,可使用专业调音台上的幻象48V
电源,也以使用 三角的 AT8801 AT8506单通道或 四道幻
电源供电器作独立供电。
低阻抗的平衡音频输出,话筒音频信号最终以卡农公头的 2号及3
号针脚输出,而 1号针脚则为地线(屏蔽)连接。输出相位将以正相
位电平设于 2号针脚上。
为濶免出现相位相互抵消而失真的情况,所有话筒连接时,接线
必需以 1-12-2
3-3型式把针脚连接。
80
Hz 以下衰减的收音效果,应用高通滤波器可减低话筒在近距离
讲话收音时的喷气声,并可减低收音环境中低频噪声(
)
声。
把话筒暴露于高温中可能导致输出电平逐渐及永久性减弱,应
免将话筒留在日晒的地方或长时间置于温度超过 43°C的地方,而
极高湿度也应避免。
技术指标
收音头 直流偏压型电容式
指向特性 心形指向性
频率响应 20-20,000 Hz
开通灵敏度 -34 dB (19.9 mV) 1V 1 Pa
输出阻抗 250 欧姆
最大承受声压 146 dB, 1 kHz 1% T.H.D.
156 dB, 10 dB 衰减
噪声 14 dB 声压
动态范围 (典型) 132 dB, 1 kHz 于最高声压
讯噪比 80 dB, 1 kHz 1Pa
高通滤波 80 Hz, 12 dB/octave
幻象供电 直流 48V,耗电 3.0 mA
典型
重量 119
外形尺寸 144.0 mm - 长度,
21.0 mm - 直径
输出连接器 内置 XLRM-3针卡农公头
附属品 AT8405a ⅝”-27接头架,
保護袋,海棉防风罩。
选择配件 :
AT8506 四通通48V幻象供电器 (
交流供
)
AT8801/EU 单通道48V幻象供电器 (
流供电 )
高通滤波

Especificaciones del producto

Marca: Audio-Technica
Categoría: micrófono
Modelo: AT4021

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