Speech Therapy f Sound: The /f/ sound is a stream of air (fricative) sound. The /f/ is voiceless. That is, the larynx does not vibrate as it does on its voiced partner, the /v/ sound. To produce a clear /f/ sound the upper teeth lightly touch the lower lip.
To an observer, the impression is that the bottom lip is being bitten by the exposed upper teeth. However the upper teeth are merely touching the bottom, with only minimal pressure. When the breath stream flows through this constriction it produces the /f/ sound. Due to the constriction formed by the teeth and lips, the breath stream is directed forward and down.
A common sound substitution for the /f/ is the voiced /b/. So fish becomes bish. The unvoiced sound partner to the /b/ sound, the /p/ sound is also a common sound error. The /f/ becomes /p/ - fish becomes pish.
How to stimulate the /f/ sound
Demonstrate the characteristics of correct /f/ production to your child.
For correct /f/ sound production, the lower part of the upper teeth con-tact the lower lip.
The air-stream passes through the narrow gap that exist between the up-per teeth and the lower lip and heads downward.
Speech Sound Structures - /f/ Sound
Click on image to download speech sound structures for /f/
Work through the following procedures with your child.
Many speech sounds can be sculpted using other speech sounds as a starting point. This involves altering or adjusting speech sounds so that they approach the target sound in nature. This works by the clinician modeling a sound that the child is able to produce. The clinician then makes slight, progressive adjustments to the sound until the target sound is generated.
Sound sculpting from the /p/ sound
Sound sculpting from the /h/ sound