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TLM-103 / 钮曼 Neumann 大震膜话筒 心型指向听不见咝咝声的大振膜录音话筒
类别：录音话筒
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详细介绍：
听不见咝咝声的大振膜录音话筒tlm103 ！字母tlm代表“无变压器录音话筒”，在众多的neumann录音话筒上都使用了平衡无变压器电路， tlm103做到了自身低杂音和高声压电平传送，其自身杂音仅仅为7db-a/17.5db ccir，因此连最细微的声音信号也能被摸拟出来。
由u67和u87发展而来的心形指向性的传感器，则?过了声音平衡并能提供额外的阻尼信号，通过使用此指向性，背景声音被弱化到了最小状态。tlm 103 外表为光洁的镍面，银灰色彩，配件包括一个sg103旋转座和一个v形支承面轴承。tlm 103 不仅适合家庭录音或是专业电台广播，而且满足商业录音工作室的使用要求，可在风琴、弦乐器、打击乐器、吉他、鼓的演奏现场使用。
特点：
·大振膜录音话筒
·指向性：心型；
·带单振膜的压力梯度传感器，有高达约5khz的平滑频率反应，在此之上，会出现4db的平坦增加；
·大金属丝网眼头置保护传感器免受爆破音的干扰并有效阻止意外噪声；
·无变压器电路；
·直接声音处理，低自身噪音：7db-a，整个录音话筒内部结构是弹性的，以减少任何可能会影响tlm103操作的结构噪声，传感器也安装在弹性装置上；
·对结构噪音和风声的干扰很敏感，配有弹性悬挂架ea103和防风罩，在近距离内使用录音话筒时建议加上防爆破音屏。
技术指标
·声音操作原理：压力梯度传感器
·指向性：心型
·频响：20hz-20khz
·灵敏度（1khz-1kΩ）：21mv/pa
·输出阻抗：50Ω
·负载阻抗：1000Ω
·灵敏度（ccir 468-3）：17.5db
·灵敏度（din/iec 651）：7db-a
·s/n比（ccir 468-3）：76.5db
·s/n比（din/iec 651）：87db
·最大声压（thd 小于0.5%）：138db
·最大输出电压：13dbu
·传感器动态范围（din/iec 651）：131db
·电压：48+4v
·电流：3ma
·录音话筒接头：xlr3f
·重量：约500克
·直径：60毫米
·长度：132毫米
The TLM 103* is the ideal large diaphragm microphone for all professional and semi-professional applications requiring the utmost in sound quality on a limited budget.
By utilizing the tried and true transformerless circuit found in numerous Neumann microphones, the TLM 103 features yet unattained low self-noise and the highest sound pressure level transmission. The capsule, derived from that used in the U 87, has a cardioid pattern, is acoustically well-balanced and provides extraordinary attenuation of signals from the rear.
The TLM 103 is available in satin nickel and matte black. Delivery includes an SG 1 metal swivel mount and a wooden jeweler's box.
Applications
Due to the universal cardioid pattern, straightforward handling, extremely low self-noise level, and finally, the price, the TLM 103 is predestined for all demanding applications from home recording to professional broadcasting and commercial recording studios.
Polar pattern
The TLM 103 is equipped with a large diaphragm capsule with cardioid pattern. By focusing on this pattern – used in most recording situations – the attenuation of unwanted rear sound has been optimized. Off-axis sounds are rendered naturally while isolation is increased. This also leads to a high feedback suppression when the microphone is used in live situations or where loudspeaker playback is a factor.
Acoustic features
The TLM 103 is addressed from the front, marked with the red Neumann logo on the microphone body. The K 103 large diaphragm capsule is based on the K 87, well known from the U 67 / U 87 microphones.The capsule has a flat frequency response up to about 5 kHz, and above that, a wide flat 4 dB presence boost.
The large wire mesh headgrille protects the capsule from plosive sounds and effectively prevents pop noises. These characteristics are achieved without resorting to corrective resonance effects.
Therefore, the microphone maintains an excellent impulse response and reproduces the finest details of music and speech without coloration.
Electrical features
With just 7 dB-A / 17.5 dB CCIR the self-noise level of the TLM 103 is so reduced that even the smallest signals are reproduced basically noise-free. As it is capable of handling sound pressure levels up to 138 dB without distortion, the TLM 103 provides a dynamic range of 131 dB (A-weighted).
The letters TLM stand for "transformerless microphone". With TLM technology the usual output transformer is replaced by an electronic circuit. As with traditional transformers, it ensures good common mode rejection, and prevents RF interference that may influence the balanced audio signal.
Operational safety
The entire internal construction is elastically mounted to attenuate any structure borne noise that could interfere with the TLM 103's operation. Furthermore the capsule is set on an elastic mount. The frequency range reaches below 20 Hz and thus even very low bass signals are reproduced without coloration.
Due to this low frequency extension, the TLM 103 is more sensitive to structure borne interference and wind noise. For such cases, the elastic suspension EA 1 and the windscreen WS 87 are available as accessories. For close vocal use, the PS 15 or PS 20 a pop screens are recommended.
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