A common error when learning French is to mistake accents for stressed syllables.  The accents you see on French words don't tell you to raise your voice, they tell you how to pronounce a vowel.

Here are what the accents mean:

The accent aigu (') which only ever appears on an e, tells you that e is pronounced as "ay".

The accent grave (`) appears on a, e or u (à, è, ù).  When it appears on an e you pronounce it "eh".  It does not change the sound of a or u.

The accent circonflexe can appear on all vowels (â, ê, î, ô, û).  It makes the a, o and e longer, but has no effect on i and u.

A cédille (ç), when it appears on a c, tells you to pronounce it as a soft c (the s sound).  You only see this when c comes before a, o or u.

A tréma (..) sometimes appears above a vowel, always the second vowel in a series.  It tells you to pronounce that vowel separately, as in Noël ("noh-el").