My isn't my code working?

Question

What am I missing here? Why does this output an error for me:
[ ..\Playground\:14:in `<main>': undefined local variable or method `loud' for main:Object (NameError ]

class Dog
def bark(noise)
@noise = n
if @noise == loud
puts "WOOF!"
elsif @noise == soft
puts "woof"
else
puts "..."
end
end
end

d = Dog.new(loud)
d.bark

Answer 1

loud and soft are not defined anywhere - do you want to pass them as strings? or as an enumerated type (which must be defined too)

Answer 2

@Dan Walker pass them as strings so how would I do that?