 Technology has since made possible electropalatography (or EPG).In order to collect EPG data, the speaker is fitted with a special prosthetic palate, which contains a number of electrodes.The way in which the electrodes are "contacted" by the tongue during speech provides phoneticians with important information, such as how much of the palate is contacted in different speech sounds, or which regions of the palate are contacted, or what the duration of the contact is.