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KMR-82i / 钮曼 Neumann 强指向录音麦克风
类别：强指向话筒(采访)
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详细介绍：
典型的应用是电影和录像，其中的麦克风不应该出现在画面。
该KMR 82是很常用的舞台上。
声学特征
原则上，纽曼话筒猎枪使用的一个压力传感器和干扰梯度管的组合。如果该频率的波长比管长度较长，麦克风的工作压力梯度传感器。他们工作在更高频率的声波干扰横向传感器。离轴声音来源是拿起了较低水平，但不着色。
因此，非常适合麦克风，记录了乐团的乐器。几个猎枪麦克风拾音地区甚至可能重叠，例如，在一个大舞台上的录音，而不会造成任何问题。
82的KMR不太敏感的风和流行时的噪音比150公里一个类似的高指向性微型麦克风。猎枪麦克风功能极低的自噪声，良好的脉冲响应和高输出水平。
拾音模式
该KMR 82是一个非常方向特性猎枪麦克风。
麦克风胶囊是定位在一个房屋管，声学开放，但具有较高的流动阻力。麦克风的方向图是瓣形。声音衰减，对侧向的频率几乎是独立的。 82的KMR在一个拥有45决定该方案的材料音调平衡音频信号°拾音角频率无关的方向性。
过滤器
2至15千赫和82千赫的KMR有提高，以补偿在空气中高频传输损耗，当录制远处传来的声音来源。这可能过分强调任何丝丝声，如果使用麦克风特写。因此，二位滑动开关允许选择的设置上是平衡的最佳频率。
该KMR 82具有高亚音速通滤波器来抑制干扰。截止频率可提高至120赫兹（ - 3 dB）和一个内置的双位拨动开关。
使用上的位置
枪麦克风具有非常高的输出能力和非常低的自噪声水平。
它具有低功耗，重量轻，灵敏度低噪声风和处理，使之成为新闻的位置采集的理想工具。
体积小，重心与平衡的中心一起，使操作简单无需任何鞭梢效应。
但是，当位置和在强风条件下，我们建议使用一个额外的风幕（包括作为标准附件）。风幕是由聚氨酯泡沫，并服务于它的手提箱皮革作为麦克风软填充。
用于移动应用的一个句柄和一个弹性悬挂可用。
声学工作原理 干扰传感器
定向模式 超心/叶
频率范围 20 Hz ... 20 kHz
灵敏度为1 kHz的1千欧 21 mV/Pa
额定阻抗 150 ohms
额定负载阻抗 1 kohms
等效噪声级，CCIR 1） 23 dB
等效噪声级，A权重1） 12 dB-A
讯噪比，CCIR 1）（rel. 94分贝声压级） 71 dB
讯噪比，A加权1）（rel. 94分贝声压级） 82 dB
最大输出电压 2.6 dBu
动态范围的麦克风放大器（A加权） 116 dB
电源电压（P48，符合IEC 61938） 48 V ± 4 V
电流消耗（P48，符合IEC 61938） 0.7 mA
匹配的连接器 XLR3F
重量 250 g
直径 21 mm
长 395 mm
The KMR 82 is a shotgun microphone with a high directivity that remains within the acceptance angle independent of the frequency.
The advantage is that a sound source, for example an actor on stage, will not change its apparent tonal balance when moving within this area.
Applications
Shotgun microphones are particularly useful in recording situations where a microphone cannot be positioned within the desired distance of the sound source to produce a sufficiently loud signal level.
Typical applications are film and video recordings, where the microphone should not appear in the picture.
The KMR 82 is very often used on stage.
Acoustic features
In principle, Neumann shotgun microphones use a combination of a pressure gradient transducer and an interference tube. If the wavelength of the frequency is longer than the tube length, the microphones work as pressure gradient transducers. At higher frequencies they operate as interference transducers for lateral sound. Off-axis sound sources are picked up with reduced level, but without coloration.
Therefore, the microphones are well suited to record individual instruments of an orchestra. The pickup areas of several shotgun microphones may even overlap as, for example, during recordings on a large stage, without causing any problem.
The KMR 82 is less sensitive to wind and pop noise when compared to the KM 150 miniature microphone with a similar high directivity. The shotgun microphone features extremely low self noise, good impulse response, and high output level.
Polar patterns
The KMR 82 is a shotgun microphone with a very directional characteristic.
The microphone capsule is positioned inside a housing tube that is acoustically open but has a high flow resistance. The directional pattern of the microphone is lobe shaped. The attenuation of lateral sound is practically independent of the frequency. The KMR 82 has a frequency independent directivity within a pickup angle of 45° for audio signals that determine the tonal balance of the program material.
Filter
Between 2 kHz and 15 kHz the KMR 82 has a boost to compensate for HF transmission losses in air when recording distant sound sources. This may overemphasize any sibilance if the microphone is used close-up. Therefore, a two-position slide switch allows to select the setting that is best for balanced upper frequencies.
The KMR 82 has a high-pass filter to suppress subsonic interference. The cutoff frequency may be raised to 120 Hz ( - 3 dB) with a built-in two-position slide switch.
Use on location
The shotgun microphone features very high output capability and a remarkably low self-noise level.
Its low power consumption, light weight, and low sensitivity to wind and handling noise, makes it an ideal tool for news gathering on location.
Small dimensions, together with a balanced center of gravity, make handling easy without any whiplash effect.
However, when on location and during strong wind conditions, we recommend using an additional wind screen (included as standard accessory). The wind screen is made of polyurethane foam and also serves as soft padding of the microphone in its leather carrying case.
For mobile use a handle and an elastic suspension are available.
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