hi..i need help

[Anushya]

hello every one...
i have started a project.ELECTRONIC GUARD FOR BLIND..what happens is,when the supply is switched ON,i get a sound of uniform intensity,even if it is closer or far away from the obstacle.basically i want to know how the infra red dual sensor works...can anyone help me and give me the reason why i get a uniform sound?

 

[Nigel Goodwin]

For a start post the full circuit digram, so far you're telling us nothing useful.