LinuxQuestions.org - internal mic sound isn't clear

Hi All,
i have problem with my ubuntu 12.04 64bit
internal mic voice of my z560 lenovo laptob isn't clean and so low

here you are output of lspci command
Code:
    00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)

    00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)

    00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)

    00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)

    00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)

    00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)

    00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)

    00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 05)

    00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 05)

    00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)

    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)

    00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)

    00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)

    00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)

    00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)

    01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 310M] (rev a2)

    01:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)

    06:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)

    07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)

    ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)

    ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)

    ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)

    ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)

    ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

    ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
any ideas how to get internal mic voice clear and loudy
Thanks in advance