| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic apparatus having an alarm audio perception function capable of allowing a user to catch an alarm audio even while listening to a desired audio signal in a large volume. ! SOLUTION: An audio signal source 13 generates a desired audio signal. A microphone 11 is disposed on the outside of a vehicle, and collects audio from the outside of the vehicle in all directions and performs audio/electric conversion on the audio collected to output the audio signal. An alarm audio perception device 12 discriminates whether an outside audio signal supplied from the microphone 11 is an alarm audio or not. When an alarm audio perception signal is supplied from the alarm audio perception device 12, a filter 14 is controlled subject to a filter property that deals with prescribed frequency band containing the frequency component of each of prescribed alarm audio, and removes or makes it an attenuated frequency band on the basis of the type of the alarm audio sensed according to th |
