Answer
When people hear their own voices as they speak, they are hearing the sound waves that travel through the air but also the waves that move through the structure of the head.
When people hear their own voices from a tape recorder, they are only hearing the sound waves that travel through the air.
Work Step by Step
When people hear their own voices as they speak, they are hearing the sound waves that travel through the air but also the waves that move through the structure of the head.
When people hear their own voices from a tape recorder, they are only hearing the sound waves that travel through the air. This is why our voices sound different to us when we hear our voices from a recording.