Medical treatment devices and methods may include a speaker operable to broadcast one or more types of sounds, wherein each type of sound may be associated with a predefined sound signature. An acoustic transducer may be used to generate a sound signal representative of a sound when broadcast by the speaker. The speaker may be commanded to broadcast a sound of the one or more types of sounds, a sound signal generated by the acoustic transducer during a time period when the speaker is expected to broadcast the sound may be monitored, and it may be determined if the speaker was operable to broadcast the sound and whether the sound was audible to a user by comparing the stored sound signal to the sound signature associated with the type of sound commanded to be broadcast.
