Adenoidal/Nasal - Some of the sound seems to come through the nose.

Appealing - Shows that you want help, approval, or agreement.

Breathy - With loud breathing noises.

Brittle - You sound as if you are about to cry.

Croaky - Sounds as if they have a sore throat.

Dead - They feel or show no emotion.

Disembodied - Voice comes from someone who you cannot see.

Flat - Spoken in a voice that does not go up and down.

Fruity - Deep and strong in a pleasant way.

Grating - Unpleasant and annoying.

Gravelly - Low and rough.

Gruff - Has a rough low sound.

Guttural - Deep and made at the back of your throat.

High-Pitched - Very high and shrill.

Hoarse - Low rough voice, usually because their throat is sore.

Honeyed - Falsely sweet voice.

Husky - A husky voice is deep and sounds hoarse often in an attractive way.

Low - Quiet and difficult to hear / in a deep voice.

Matter-of-fact - Used about someone's behavior or voice.

Modulated - Controlled and pleasant to listen to.

Monotonous - Boring because it does not change in loudness or become higher or lower.

Orotund - Loud and clear.

Penetrating - So high or loud that it makes you uncomfortable.

Plummy - This word shows that you dislike people who speak like this.

Quietly - In a quiet voice.

Raucous - Loud and sounds rough.

Ringing - very loud and clear.

Rough - Not soft and is unpleasant to listen to.

Shrill - Very loud, high, and unpleasant.

Silvery - Clear, light, and pleasant.

Singsong - Rises and falls in a musical way.

Small - A small voice or sound is quiet.

Smoky - Sexually attractive in a slightly mysterious way.

Softly Spoken - A quiet gentle voice.

Sotto Voce - A very quiet voice.

Stentorian - Loud and severe.

Strangulated - One that someone stops before they finish making it.

Strident - Loud and unpleasant.

Taut - Shows someone is nervous or angry.

Thick - Voice sounds less clear because of an emotion.

Thin - High and unpleasant to listen to.

Throaty - Low and seems to come from deep in your throat.

Tight - Shows that you are nervous or annoyed.

Toneless - Does not express any emotion.

Tremulous - It is not steady because you are afraid or excited.

Wheezy - Has difficulty breathing.

Wobbly - Unstable tone due to fright or emotions.