comments:
I mean, you could just copy thisthat same thing for salmon Amazon
You could get one of those voice recording keychains and record the sound you want and make a special case replacing the switch with a keyboard key. This is probably the easier way. It already has a speaker, a switch and sound module https://www.amazon.com/Neutral-Talking-Keychain-Buzzers-Recording/dp/B07RJ39XKF?th=1 The harder way will be to do it with a microcontroller board, like Arduino, ESP32 or similar. This way you will have to also find a sound recording module, a switch, a speaker, battery, battery charging module (if it's going to be rechargable) and design a case for it all. Then you will need to program the microcontroller to play the sound when the switch is triggered. I doubt you can fit it all in a keychain form factor, but never say never.