This clip explains that during puberty the voice can become unstable, yodel, crack, sound hoarse, and shift between high and low pitches, which can be embarrassing and emotionally difficult for many boys. It notes that some children may subconsciously or consciously try to prevent the strange voice from coming through by holding the larynx up or keeping the pitch higher, which can interfere with the voice lowering, and that carrying a high, thin voice into adulthood may increase the risk of bullying and lasting emotional impact; in some cases, the voice simply doesn’t drop enough.