What is a pyrotechnic device defined as in the relevant standard?

A pyrotechnic device is defined as a device that produces a special effect using pyrotechnic materials. This includes a variety of effects such as flashes, bursts, and other visual spectacles that rely on chemical reactions to create their impact. Pyrotechnic materials are those that undergo rapid combustion, generating heat, light, sound, gas, and/or smoke. This definition emphasizes the use of specific materials and the production of visual or auditory effects, distinguishing pyrotechnic devices from other types of devices that may create noise or provide effects without the use of these specialized materials.

In contrast, the other options describe characteristics that do not encapsulate the comprehensive nature of pyrotechnic devices. For example, creating noise without visual effects does not align with the typical functions of a pyrotechnic device, as most are expected to produce both visual and auditory effects. Limiting the context to indoor displays also does not accurately reflect the broader applications of pyrotechnic devices, which can be utilized in various environments, including outdoor settings. Lastly, the notion of being used without regulatory oversight misrepresents the stringent regulations governing the use and operation of pyrotechnic devices, as safety and compliance are critical components in their handling and display.