---
kind: "section"
citation: "21 C.F.R. § 874.5840"
title: "21"
number: "874.5840"
heading: "Antistammering device."
url: "https://uscodex.org/cfr/21/874.5840"
---

# §874.5840. Antistammering device.

- (a) **Identification.** An antistammering device is a device that electronically generates a noise when activated or when it senses the user's speech and that is intended to prevent the user from hearing the sounds of his or her own voice. The device is used to minimize a user's involuntary hesitative or repetitive speech.
- (b) **Classification.** Class I (general controls). The device is exempt from the premarket notification procedures in [subpart E of part 807](/cfr/21/part807-subpartE.md) of this chapter subject to [§ 874.9](/cfr/21/874.9.md).

## Notes

### Amendments

[51 FR 40389, Nov. 6, 1986, as amended at 65 FR 2316, Jan. 14, 2000]

### Authority

Authority: 21 U.S.C. 351, 360, 360c, 360e, 360j, 360 l, 371.

### Source

Source: 51 FR 40389, Nov. 6, 1986, unless otherwise noted.

### Amendments

[51 FR 40389, Nov. 6, 1986, as amended at 65 FR 2316, Jan. 14, 2000]