Avatar
Please consider registering
Guest
Search
Forum Scope


Match



Forum Options



Minimum search word length is 3 characters - maximum search word length is 84 characters
Register Lost password?
sp_Feed sp_TopicIcon
Microphone's output (recorded audio) is not stable
Avatar
Member
Members
Forum Posts: 1
Member Since:
May 15, 2018
sp_UserOfflineSmall Offline
1
June 17, 2018 - 7:20 am
sp_Permalink sp_Print

We are developing an audio processing system. As a part of its process, we play a pure sinusoidal signal with constant amplitude in a speaker, and record the audio emanated from the speaker with a unidirectional microphone.

When the distance between the microphone and the speaker is (almost) zero, we get consistent audio recorded in the microphone. However, when the distance is increased, we see that the audio in the microphone fluctuates in terms of its amplitude, and the higher the distance, the greater the fluctuation.

Is it happening due to any environmental reason like reflections? How can we make the microphone input stable?

Avatar
Chief Acoustics Engineer
Forum Posts: 389
Member Since:
August 12, 2013
sp_UserOfflineSmall Offline
2
June 18, 2018 - 5:58 am
sp_Permalink sp_Print

R, You need to stabilize the low-frequency unwanted pressure in the room. Secondly, you need to manage the time signature of the reflections from boundary surfaces.

Forum Timezone: America/Los_Angeles
Most Users Ever Online: 31
Currently Online:
Guest(s) 6
Currently Browsing this Page:
1 Guest(s)
Forum Stats:
Groups: 4
Forums: 10
Topics: 376
Posts: 1024

 

Member Stats:
Guest Posters: 23
Members: 14816
Moderators: 0
Admins: 2
Administrators: admin, Dennis Foley