Skip to content Skip to navigation

Connexions

You are here: Home » Content » Hardware Implementation for Audio Localization

Navigation

Recently Viewed

This feature requires Javascript to be enabled.
 

Hardware Implementation for Audio Localization

Module by: Elizabeth Gregory, Joseph Cole. E-mail the authors

Summary: In this section, we will go over the hardware implementation, including the TI TMS320C6211 DSK Board features and the microphone array.

TI TMS320C6211 DSK Board

You can find a description of the board on the TI website.

To receive the signals, we decided to use the McBSP1 receive interrupt so we could read the values from our two 16 bit channels simultaneously.

Microphone Array

Figure 1
The Microphones and the Circuit
The Microphones and the Circuit (figure13.JPG)

As shown in Figure 1, we used two electret microphones spaced 10 cm apart. Each microphone was amplified with identical non-inverting op-amp circuits (LM386), as shown in Figure 2. This circuit includes a low-voltage audio power amplifier and internal feedback with fixed gain.

Figure 2
The Microphone Amplifier Circuit
The Microphone Amplifier Circuit (figure14.jpg)

Content actions

Download module as:

PDF | EPUB (?)

What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

Downloading to a reading device

For detailed instructions on how to download this content's EPUB to your specific device, click the "(?)" link.

| More downloads ...

Add module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks