Can my baby decipher the tone in my voice?

Yes. From he time he is in your womb, your baby is recognizing your voice, infants are attuned to our voices and emotions. By the time your baby is born it will only take a couple of weeks for him to figure out it the voice belongs to you. Parents tend to increase the pitch and change the cadence of their voice when talking to babies. It is suggested this helps learn different speech patterns.
Yes. Your baby knows your voice very well from early on and will understand your tone if used in appropriate situations with consistency. This is how they learn what tones in your voice mean when you use them.

Related Questions

Is it possible to have had a vocal hemorage with no effect on the sound, pitch, tone or quality of my voice? And would it cause any weird sensations?

Just hoarseness... The hoarseness caused by a vocal cord hemorrhage usually develops over a very short period of time, and usually occurs as a result of an event that required strong use of the voice such as a musical performance or talking loudly. There is usually no pain with a vocal cord hemorrhage, so hoarseness is often the one symptom.

I am 21. It has been over a year now since I took some bad hgh, my voice has changed to a weaker, raspy tone+muscles get sore fast. Will it reverse?

Need it checked. It may not reverse if it's already been a year. Anytime you have a voice change that lasts longer than 3 weeks, it is usually something abnormal. You need to have a doctor (ENT) take a look at your voice box.
Voice changes. The hgh may or may not have anything to do with your voice and swallowing issues. If you have been off the hgh for over a year-its is unlikely unless it was tainted with something. There are other causes for your issues, such as reflux/heartburn, vocal abuse or a growth in your neck/vocal cords. I would recommend that you have an ent, like myself, look at your vocal cords.
Yes, but need exam. Hgh affects muscle mass and growth, and can cause hoarseness related to metabolism of hormones with resultant deepening of the voice. Sometimes the body compensates but developing tension in the vocal folds, hence the hoarseness. Other trauma can occur on the vocal folds as well. If your hoarseness is over 1 year, you need to see an ENT for an exam of your voicebox.