হেডফোন কে তৈরি করেছেন ?

Question

Sister Links: -- Nishiddho--BDLove24--Cerapatabd ....

হেডফোন কে তৈরি করেছেন ?

1 Answer

parasite · Answer 1 · 2021-03-25T08:21:20+0000

Nathaniel Baldwin of Utah in 1910 invented a prototype telephone headset due to his inability to hear sermons during Sunday service. He offered it for testing to the US Navy, which promptly ordered 100 from Baldwin.

Categories

হেডফোন কে তৈরি করেছেন ?

Please log in or register to add a comment.

Your answer

Take a look at the rules carefully :

N.B: If you do not follow the rules, it will be difficult to get payment

1 Answer

Please log in or register to add a comment.

Related questions