Yes. When you listen to yourself as you're speaking, something like half of what you hear is reaching the sound receptors of your inner ear via the bones of your jaw and skull. That's why it can sound strange to you when you hear a recording of your voice on playback, even on good equipment: it's missing a prominent component you're used to hearing and you will perceive it as sounding thinner.Also, aren't the acoustics of hearing your own voice different than hearing others' voices? After all, your ears receive the sound not just from the outside, but also as a vibration coming from your throat that is transmitted through the body to the ears.