acoustics

Logarithmic averaging preset function in excel - using ranges as input values

由 ε祈祈猫儿з 提交于 2020-01-16 23:41:13
问题 I need to add my own function for logarithmic averaging to excel but i'm not sure how to have a range of values as an input value or how to make count the number of values in a given range. I have a small amount of experience with programming. The formula i usually use in excel and am looking to implement as a pre-set function is the following: =10*LOG(SUM(10^('range of values'/10)/'number of values in the range')) Can anyone help me out? 回答1: You can try this, you may need to adjust to

How should I set “bw” options for acoustic model adaption?

由 戏子无情 提交于 2019-12-25 17:18:00
问题 In tutorials it has written this command: ~~~ ./bw \ -hmmdir en-us \ -moddeffn en-us/mdef.txt \ -ts2cbfn .ptm. \ -feat 1s_c_d_dd \ -svspec 0-12/13-25/26-38 \ -cmn current \ -agc none \ -dictfn cmudict-en-us.dict \ -ctlfn arctic20.fileids \ -lsnfn arctic20.transcription \ -accumdir . ~~~ But I checked my feat.params and it has this content: ~~~ -lowerf 130 -upperf 6800 -nfilt 25 -transform dct -lifter 22 -feat 1s_c_d_dd -svspec 0-12/13-25/26-38 -agc none -cmn current -varnorm no -model ptm

Acoustic Echo Cancellation (AEC) in embedded software

由 主宰稳场 提交于 2019-12-09 07:53:38
问题 I am doing a VoIP project on embedded device. I have built a sample using a 32bits MCU with a low grade audio codec. Now I found that there is echo issue on my device, that is I can hear what I said from the speaker. I have do some research and found that most appliaction use a DSP codec with acoustic echo cancellation feature. However, is it possible that I do the acoustic echo cancellation in the software, using my 32bits MCU? Can you adive the algorithm, or even source code:P, for doing

iOS Tone Generator with variable Oscillation Patterns

由 邮差的信 提交于 2019-12-07 08:44:42
问题 I have a Tone Generator Application that generates a tone based on Slider Value for frequency. This part of the application works fine. I'm redering tone using #import <AudioToolbox/AudioToolbox.h> OSStatus RenderTone( void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData) { // Fixed amplitude is good enough for our purposes const double amplitude = 0.25; // Get the tone parameters out

Acoustic fingerprint code for iOS?

由 旧城冷巷雨未停 提交于 2019-12-06 05:37:05
问题 I've started looking on the subject of Acoustic Fingerprint (http://en.wikipedia.org/wiki/Acoustic_fingerprint) for a pet project of mine for the iOS and I was wondering if there are: Any opensource libraries or source code for the iOS that handle this? Assuming I'm a veteran jack of all trades coder, is it very problematic to implement this myself if there is no open-source versions? Will the Accelerate DSP library in iOS able to handle such a task? Thanks 回答1: Not of my knowledge No problem

Acoustic fingerprint code for iOS?

由 拜拜、爱过 提交于 2019-12-04 09:27:58
I've started looking on the subject of Acoustic Fingerprint (http://en.wikipedia.org/wiki/Acoustic_fingerprint) for a pet project of mine for the iOS and I was wondering if there are: Any opensource libraries or source code for the iOS that handle this? Assuming I'm a veteran jack of all trades coder, is it very problematic to implement this myself if there is no open-source versions? Will the Accelerate DSP library in iOS able to handle such a task? Thanks Not of my knowledge No problem for a veteran, that won't be easy, but achievable. Never looked into. Even in java, this might be an

Acoustic Echo Cancellation (AEC) in embedded software

由 六月ゝ 毕业季﹏ 提交于 2019-12-03 08:57:24
I am doing a VoIP project on embedded device. I have built a sample using a 32bits MCU with a low grade audio codec. Now I found that there is echo issue on my device, that is I can hear what I said from the speaker. I have do some research and found that most appliaction use a DSP codec with acoustic echo cancellation feature. However, is it possible that I do the acoustic echo cancellation in the software, using my 32bits MCU? Can you adive the algorithm, or even source code:P, for doing acoustic echo cancellation? I know sophisticated method is not possible on a MCU, whereas a simple
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