1.   His voice had a smooth hypnotic effect.

2.   His voice had a soothing hypnotic effect.

3.   Riding in a car often has a hypnotic effect on babies.

4.   The metrical chugging of the machinery had a hypnotic effect.

5.   The drums deliver an almost hypnotic effect as the dancers circle the floor.

6.   Even in the most insignificant exchange, the man has a hypnotic effect.

7.   In fact, he emphasizes it with a design whose rhythm echoes the hypnotic effect of the broken line down a highway.

8.   One technique Howard uses to break through the hypnotic effect is to play back violent television scenes in slow motion.

9.   Repetitive guitar riffs in high C have something of a hypnotic effect, and the words of the songs are catchy, even if depressing.