Inside the metal head there's an accelerometer that measures the forces within the impact.

里面的金属头有一个加速计，其影响范围内的措施的力量。

youdao

The metal plate behind my head radiated heat.

我脑后的金属盘散发出热量。

《柯林斯英汉双解大词典》

The sound is deafening as metal strikes metal, battering my eardrums.Wood chips whizz past my head and the temperature seems to be rising in this small and dusty workshop.

金属相互撞击声振聋发聩，木屑唰唰的飞过我的头顶，这个又小又脏的屋子的温度似乎正在上升。

youdao

I had my head in and was about to open the lantern, when my finger slid on a piece of metal and made a noise.

VOA: special.2009.05.16

Due to an explosion, a metal pipe went through his head like so.

由于一场爆炸,一根钢管刺穿了他的脑袋,就像这样

耶鲁公开课 - 心理学导论课程节选

Then I stood on our balcony, my hands gripping the cold metal balustrade above my head.

NEWYORKER: Naima

The Medicines and Healthcare products Regulatory Agency (MHRA) has issued new advice saying patients with these large head diameter metal-on-metal hips will need monitoring for the life-time of the implant.

BBC: Annual checks for patients with all-metal hips

It comes in two parts: there's an adjustable cradle that fixes the device to your head, and the computer itself is in a metal bar that curls around the side of your head.

BBC: Motorola unveils a computer that straps onto your head