HMD 27
专用于室外制作,评论员和工程师的专业广播级头戴式耳机。

HMD 27
物品号 506902

新款HDM 27系列头戴式耳机能够为广播评论员和音频工程师提供高质量的声音体验以及佩戴的舒适性。HDM 27采用包耳式封闭耳罩设计,这种超轻型设计不仅可以提供一个大程度的外界噪声衰减,还可以为长时间的工作过程提供舒适的佩戴。柔软的包耳式耳罩确保了佩戴的舒适性。与此相似的HMS 26系列头戴式耳机具有自动适应的分叉式两段头带,因此不会对敏感的头顶部产生压力。对于那些更愿意选择传统方式耳机头带的用户,产品还提供了一个更宽的头带衬垫,从而将两个头带合并为一个头带。

  • 轻巧的包耳式耳罩以及分叉式两段头带(不会对敏感的头顶部产生压力)带来了佩戴舒适性。

  • 精确和线性的声音再现,满足所有苛刻的监听需求

  • 动圈式话筒的特性,使其在噪声环境中仍然能够实现广播质量。

  • 主动式降噪(ActiveGard©)(用户可控制开关)在噪声峰值大于110分贝时,可以起到保护听觉系统的作用。

  • 线缆和支架采用模块化设计,实现了灵活性和适应性

  • 26-II系列的各种线缆完全兼容

  • 可旋转的耳罩设计,满足单耳听音的需要

  • 话筒能够佩戴在左边或右边

  • 产品附带的宽大头带衬垫能够将两个分叉头带合并为传统的一体式头带

 
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Specifications
包装内含
  • 个大型头带衬垫
  • 个防风和防喷罩
  • 个线缆夹
  • 本快速指导手册
  • 本安全使用手册
  • 不提供连接线缆-请单独订购(参见附件)

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FAQ
  • What does the NoiseGard on/off switch do?

    The NoiseGard on/off switch is the switch that allows you to turn the active noise compensation circuitry on or off. It comes with a two colors LED for-power on and low battery-on headsets using a battery pack.

    NOTE: If you should turn off the NoiseGard system there is no loss of, or reduction of, the received audio and you still retain the passive capabilities of the headset. You may have to increase the receiver volume to compensate for the increase of ambient noise due to the loss of the NoiseGard feature. The LED is located on the control-unit respective to the battery pack of the headsets. The control unit is included in-line on the models HMEC 45/46 series, HMEC 25/26 series, and HMEC 460 series. An optional battery pack is available for the HMEC 350 series.



  • What is the maximum SPL of a dynamic microphone?

    It is a common saying that dynamic microphones just have no maximum SPL.
    This saying is not technically exactly correct but for every day use use of dynamic microphones you will not find gain limitations. At SPL levels above 160 dB some mechanical problems might occur (for example the voice coil might crash onto the magnet) but these SPL levels are very hard to find in real world.
    Here at Sennheiser we use dynamic microphones for distortion measurements on loudspeakers at very high sound pressure levels. At Sennheiser we have measured the SPL and THD inside a large 2" driver/horn combination with a MD 421. The max SPL this combination was able to produce was 150 dB and the THD level recorded by a MD 421 was below 1% (produced by the driver not by the mic)
    So as a conclusion we can state the MD 421 has no maximum SPL limitations for practical use. However if using dynamic microphones at high SPL levels a user should be aware that the very high voltage (up to several volts) delivered by the microphone might cause problems when connected to mic preamps.



下载

  • 技术信息
    • Cable compatibility for Headset series 27 (HMD 27 / HME 27 / HMDC 27) (310 KB) 下载

    • Cable compatibility for broadcast headsets (190 KB) 下载

  • 安全指南
  • 使用说明书
    • 使用说明书 HME 27 / HMD 27 / HMDC 27 (HTML) 下载

  • 欧盟符合性声明
    • EU Declaration of Conformity HME 27 / HMD 27 / HMDC 27 (900 KB) 下载

  • 规格表
    • Product Specification HME 27 / HMD 27 / HMDC 27 (150 KB) 下载