主板蜂鸣器听歌声音很小,是正常现象吗?

CPU/显卡/打印机/USB设备等硬件问题
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科学之子
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注册时间: 2013-05-26 6:58
系统: Debian 9

主板蜂鸣器听歌声音很小,是正常现象吗?

#1

帖子 科学之子 » 2016-08-08 20:27

主板蜂鸣器听歌声音很小,是正常现象吗?
平时蜂鸣器报警时声音很响亮啊?
采取的蜂鸣器听歌方式:

代码: 全选

rmmod pcspkr
modprobe snd-pcsp
mplayer -ao alsa:device=hw=pcsp ./XX.mp3

代码: 全选

# dmidecode 2.12
SMBIOS 2.6 present.
41 structures occupying 1914 bytes.
Table at 0x000FCF50.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
        Vendor: LENOVO
        Version: 90KT20CUS
        Release Date: 09/14/2010
        Address: 0xF0000
        Runtime Size: 64 kB
        ROM Size: 1024 kB
        Characteristics:
                ISA is supported
                PCI is supported
                PNP is supported
                APM is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                ESCD support is available
                Boot from CD is supported
                Selectable boot is supported
                BIOS ROM is socketed
                EDD is supported
                5.25"/1.2 MB floppy services are supported (int 13h)
                3.5"/720 kB floppy services are supported (int 13h)
                3.5"/2.88 MB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                CGA/mono video services are supported (int 10h)
                ACPI is supported
                USB legacy is supported
                LS-120 boot is supported
                ATAPI Zip drive boot is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
        BIOS Revision: 1.20
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vickycq
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Re: 主板蜂鸣器听歌声音很小,是正常现象吗?

#2

帖子 vickycq » 2016-08-08 20:55

kent 写了:...有源蜂鸣器能发出不同的音调,但离开谐振频率后,发出的声音只有66-76分贝/5V/30CM(行业通用的测试方法),并且音量大小受频率影响...
参考 http://www.amobbs.com/forum.php?mod=vie ... pid4465208
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