Subject: question about speech level From: ali fallah <ali.fallah@xxxxxxxx> Date: Mon, 23 Jul 2012 14:15:26 +0430 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--e89a8fb201e206e99e04c57c1b08 Content-Type: text/plain; charset=ISO-8859-1 Dear List For creating speech in desired level, I have an AC40 audiometer that produce speech signal in selected dB SPL from a wav file. The recordings has silent periods before and after speech signal. If I delete silent periods before and after the speech signal, the sound intensity that audimeter produce, will not change. Now I want to prepare a mixture of speech and noise in optional SNR values in Matlab but the RMS value of speech signal depends on silent gaps. I have two question about this: I want to know for speech signal that is nonstationary, how desired level in dB SPL is set . Also how can I mix speech and noise in Matlab by setting noise in desired value (for example noise level=65dBSPL and SNR=-10 until we have speech in 55 dBSPL). I will grateful if anyone guide me about this and let me know about related documents. best regards --e89a8fb201e206e99e04c57c1b08 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <div>Dear List</div> <div>=A0</div> <div>For creating speech in desired level,=A0I have an AC40 audiometer that= produce speech signal=A0in=A0selected dB SPL=A0from a wav file. The=A0reco= rdings=A0has silent periods before and after speech signal. If=A0 I=A0delet= e silent periods before and after the speech signal, the=A0sound intensity= =A0 that audimeter produce, will not change.=A0=A0Now I want to=A0prepare a= mixture of speech and noise in optional SNR values in=A0Matlab but the RMS= value of speech signal=A0depends on =A0silent gaps.=A0</div> <div>=A0</div> <div>I have two question about this: I want to know for speech signal that = is nonstationary, how=A0 desired level in dB SPL is set=A0. Also how=A0can = I mix speech and noise in Matlab by setting noise in desired value (for exa= mple noise level=3D65dBSPL and SNR=3D-10 until we have speech in 55 dBSPL).= =A0 </div> <div>I will grateful if anyone guide me about this and let me know about re= lated documents.</div> <div>=A0</div> <div>best regards</div> --e89a8fb201e206e99e04c57c1b08--