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Schoeps话筒麦克风 MK 8 话筒  Schoeps麦克风 MK8  8字形话筒

话筒拾音头 MK 8

纯压力梯度传声器

整个频率范围内具有理想的一致性8字形指向

模式

侧向拾音（拾取方向和话筒筒身垂直）

很适用于M/S和Blumlein立体声录音

这种类型的拾音头是真正的偶极（双向）传声器，由一个振膜来控制。其主轴和拾音头的角度为0°

和180°，分别用红点和黑点做了标识。当制作M/S制式立体声录音时，从话筒安装位置的后侧看，其0°轴通常位于左侧（从话筒后面看）。

刻在话筒顶端的“8”字形应该位于水平方向，与拾音头成直角。话筒应该直接放置于“M”通道话筒的正上方或正下方，并尽可能地靠近它。

这种话筒类型使用的纯压感式传声器具有如下内

在的高品质特性：

－降低低频灵敏度。

－指向性与频率无关。

－会出现近讲效应。

MK8的声音质量清晰并忠实于原音。频响跌落特性出现在16kHz以上。

当MK8作为点话筒时，必须要注意避免拾取到来自话筒后方的反射声或多余的直达声，因为如果拾取到来自后方的声音其极性会翻转。这会让有用声音的极性抵消，并影响更高频率上梳状滤波器的效果。

8字形拾音头的指向性和心形相同；如果这两种话筒和音源等距，将会拾取到数量相近的直达声和混响声。实际上，这很具有欺骗性，因为8字形拾音头不会响应来自两侧、主轴上部或下部的声音，而心形拾音头则会响应。8字形拾音头其后突角和前突角具有相同的灵敏度，这样可以补偿数量上的差异－但通常在混响设置中，声音到达8字形拾音头的后突角会被延迟，并会扩散到比混响声能量（心形拾取前方和两侧的声能）更大的区域；反射声通常会受到更多的高频吸收。因此8字形拾音头虽然在理论上拾取到等量的混响声能，但在相同的位置和心形拾音头比较，特性上具有很大的差异。

长度：22mm

直径：20mm

重量：17g

MK 8 MICROPHONE CAPSULE

PROPERTIES

Figure-8 characteristic (pure pressure-gradient transducer)

Pickup direction: Lateral (perpendicular to the microphone axis)

0°-axis marked with a red dot

Preferred application: M/S, double M/S and "Blumlein" stereo

DESCRIPTION

The MK 8 is often used for M/S and double M/S stereo sound in film sound and music recording, in combination with Colette or CCM microphones and/or a CMIT shotgun microphone.

This type of capsule is a pure dipole. The figure-eight pattern of the MK 8 remains constant from low to high frequencies, which is particularly important when used in an M/S setup. Its sensitivity rolls off more at low frequencies than other capsules, but proximity effect (which can compensate, given relatively close placement) is also more pronounced.

Production of the MK 8 is a special technical accomplishment, because in terms of physics, the available force due to the pressure gradient is minimal. Despite this, the MK 8 has excellent frequency and polar response, near-perfect front/back symmetry, and low inherent noise.

The microphone is comparatively sensitive to solid-borne sound as well as wind and breath noise. Good protection should be considered, e.g. suitable wind screening and/or shock mounting.

The pickup direction is lateral, i.e. perpendicular to the microphone housing, and the 0° and 180° axes are indicated respectively by red and black dots on the capsule housing. When recording with M/S, the 0° axis (as viewed from a b behind the microphone) should point to the left, and the "8" engraved on top of the capsule should be precisely horizontal.

TECHNICAL SPECIFICATIONS

Pickup pattern

Figure-of-eight

Frequency range : 40 Hz - 15 kHz with CMC6,

40 Hz - 15 kHz with CMC6xt (above 20 kHz, the level of -3 dB for the cutoff frequency is not exceeded despite the xt boost)

Sensitivity : -38,5 dB (V/Pa), 12 mV/Pa with CMC 6

Equivalent noise level (A-weighted) : 17 dB with CMC 6

Equivalent noise level (CCIR) : 26 dB with CMC 6

Signal-to-noise ratio (A-weighted) : 77 dB with CMC 6

Maximum sound pressure level (THD < 0.5 %) : 133 dB-SPL with CMC 6

Length : 34 mm

Diameter : 20 mm

Weight : 18 g

Surface finish : matte gray (g) or custom color