If you really want a quiet (and almost silent miner) you could look at USB miners.
This type of miner is just going to give you an headache, you won't usually get profit with it. Yes can mine with it but you'll get profit accordingly, besides if you want to have a silent office miner nothing has been existing such as like that.
This is a way to do it just for fun
I doubt it that there is someone that will dedicate his time and money just to mine for nothing.
Hi all,
Id like to either build or buy a quiet office miner. I know that it wont be the most powerful thing but id like to try to have my hand at mining some cheap altcoins for fun. I have my own office but would like to keep it quiet so I don't bother my employees and customers since I work as a dentist. What are your thoughts? or should i just bite the bullet and mine at home with the ant miner s9?
I have read some employees who are sharing pictures that their boss does have mining on their office. Don't you have a second floor or some other rooms nearby on your office? If you still insist that you want to put your miner on your office, try to use egg trays, put it on the wall so it won't bother you, your employees, your customers while you are mining.