Actual technologies that exist that could have been used to cause me severe emotional distress

 Technologies that exist that make hearing voices remotely, possible...

A voice modulator is a device or software that alters the characteristics of a person's voice signal in real-time. Its primary function is to modify the pitch, tone, and timbre of the voice, creating various sound effects and voice transformations.

The key capabilities of a voice modulator include:

Pitch shifting: Raising or lowering the perceived pitch of the voice, allowing the user to sound like a different gender (male to female or vice versa), a child, or even an animal.

Voice distortion: Applying various distortion effects like robotic, monstrous, or alien-like voices by altering the harmonic structure of the voice signal.

Modulation effects: Adding effects like vibrato, tremolo, or other modulations to the voice, creating unique timbres and textures.

Voice masking: Disguising the speaker's identity by altering the voice's characteristics, useful for anonymity or privacy purposes.

Voice synthesis: Some advanced voice modulators can synthesize entirely new voices or mimic existing voices using voice cloning techniques.

Voice modulators achieve these effects through various signal processing techniques, such as filtering, pitch shifting, harmonic synthesis, and modulation. They can be implemented as hardware devices with microphones and speakers, or as software applications that process the voice input from a microphone in real-time.

Voice modulators find applications in entertainment (video games, movies, music production), privacy and security (anonymous communication), accessibility (voice conversion for speech impairments), and creative expression (voice acting, podcasting, streaming). They allow users to explore different vocal identities, create unique sound effects, or simply have fun by altering their voice in real-time

Yes, there are several other wireless technologies besides GSM that can be used for audio and video bugging or surveillance devices:

Wi-Fi Bugs: These devices transmit audio and video over Wi-Fi networks, either an existing network or creating their own ad-hoc network. They can have a longer range than Bluetooth and don't require a cellular connection.

Bluetooth Bugs: Small, low-power devices that transmit over Bluetooth, often disguised as everyday objects like USB drives or power banks. Limited range but easy to conceal.

Analog Radio Frequency (RF) Bugs: Transmit audio over radio frequencies like VHF or UHF bands. Can have ranges from tens of meters to over a kilometer depending on transmitter power.

Digital RF Bugs: Similar to analog RF bugs but use digital modulation and encryption for better audio quality and security over longer ranges.

Infrared (IR) Bugs: Transmit audio and video over IR beams, with a limited range but can penetrate some non-metallic surfaces.

LoRa/LoRaWAN Bugs: Use the long-range, low-power LoRa wireless protocol for transmitting over several kilometers in urban areas.

Satellite Bugs: Expensive but can transmit globally by uplinking to commercial or private satellite networks.

Many of these technologies allow for two-way audio/video transmission and remote activation/deactivation. The choice depends on factors like desired range, concealment needs, bandwidth requirements, and legal restrictions in the area of operation. Counter-surveillance equipment is required to detect and locate such wireless bugging devices.

So in summary Voice modulators may be common for gamers to use to conceal their identity which is a good thing but when used in a nefarious way can cause someone severe emotional disturbances....